Stop Webcomic from posting on Main Page/Blog Feed ( other ?)

I don’t know the particulars of jeffsorley’s setup, but I’m guessing he was using Webcomic’s integrate option, which displays the most recently published webcomic on the homepage. You can alter this behavior by creating a custom webcomic/loop_start.php template in your current theme (e.g. if you’re using Twenty Twelve, the new template would be in /wp-content/themes/twentytwelve/webcomic/loop_start.php). You can copy Webocmic’s own lopo_start.php template (found in /wp-content/plugins/webcomic/-/php/integrate/loop_start.php) into the correct location and modify it as you’d like. To remove webcomics from the homepage you’ll want to remove all of the code for the is_front_page() condition:

<?php
/** Automagic integration for loop_start.
 *
 * @package Webcomic
 * @uses first_webcomic_link()
 * @uses previous_webcomic_link()
 * @uses random_webcomic_link()
 * @uses next_webcomic_link()
 * @uses last_webcomic_link()
 * @uses the_webcomic()
 * @uses the_webcomic_collection()
 * @uses the_webcomic_storylines()
 * @uses the_webcomic_characters()
 * @uses is_webcomic()
 * @uses is_webcomic_archive()
 * @uses webcomic_collection_title()
 * @uses webcomic_collection_poster()
 * @uses webcomic_collection_description()
 * @uses is_webcomic_storyline()
 * @uses webcomic_storyline_title()
 * @uses webcomic_storyline_cover()
 * @uses webcomic_storyline_description()
 * @uses is_webcomic_character()
 * @uses webcomic_character_title()
 * @uses webcomic_character_avatar()
 * @uses webcomic_character_description()
 */
?>

<?php if ( !is_feed() ) { ?>
	<style scoped>.webcomic-img img{height:auto;max-width:100%}</style>
<?php } ?>

<?php if ( is_front_page() ) { ?>
	<!-- don't do anything -->
<?php } elseif ( is_webcomic() ) { ?>
	<div class="integrated-webcomic">
		<nav class="webcomic-above"><?php first_webcomic_link(); previous_webcomic_link(); random_webcomic_link(); next_webcomic_link(); last_webcomic_link(); ?></nav><!-- .webcomic-above -->
		<div class="webcomic-img"><?php the_webcomic( 'full', 'next' ); ?></div><!-- .webcomic-img -->
		<nav class="webcomic-below"><?php first_webcomic_link(); previous_webcomic_link(); random_webcomic_link(); next_webcomic_link(); last_webcomic_link(); ?></nav><!-- .webcomic-below -->
	</div><!-- .integrated-webcomic -->
<?php } elseif ( is_webcomic_archive() ) { ?>
	<h2 class="webcomic-collection-title"><?php webcomic_collection_title(); ?></h2><!-- .webcomic-collection-title -->
	<div class="webcomic-img webcomic-collection-poster"><?php webcomic_collection_poster(); ?></div><!-- .webcomic-collection-poster -->
	<div class="webcomic-collection-description"><?php webcomic_collection_description(); ?></div><!-- .webcomic-collection-description -->
<?php } elseif ( is_webcomic_storyline() ) { ?>
	<h2 class="webcomic-storyline-title"><?php webcomic_storyline_title(); ?></h2><!-- .webcomic-storyline-title -->
	<div class="webcomic-img webcomic-storyline-cover"><?php webcomic_storyline_cover(); ?></div><!-- .webcomic-storyline-cover -->
	<div class="webcomic-storyline-description"><?php webcomic_storyline_description(); ?></div><!-- .webcomic-storyline-description -->
	<nav class="webcomic-storyline"><?php first_webcomic_storyline_link(); previous_webcomic_storyline_link(); random_webcomic_storyline_link(); next_webcomic_storyline_link(); last_webcomic_storyline_link(); ?></nav><!-- .webcomic-storyline -->
<?php } elseif ( is_webcomic_character() ) { ?>
	<h2 class="webcomic-character-title"><?php webcomic_character_title(); ?></h2><!-- .webcomic-character-title -->
	<div class="webcomic-img webcomic-character-avatar"><?php webcomic_character_avatar(); ?></div><!-- .webcomic-character-avatar -->
	<div class="webcomic-character-description"><?php webcomic_character_description(); ?></div><!-- .webcomic-character-description -->
	<nav class="webcomic-character"><?php first_webcomic_character_link(); previous_webcomic_character_link(); random_webcomic_character_link(); next_webcomic_character_link(); last_webcomic_character_link(); ?></nav><!-- .webcomic-character -->
<?php }

Webcomic doesn’t include anything for displaying social links with webcomics, but there’s probably at least one other plugin in the directory that will add them for you.

1. Yep; the important thing is you want to find one that supports custom post types, which is what Webcomic’s webcomic posts actually are. A quick Google search brought up Social Maven as the first result, which purports to support custom post types (I don’t use such plugins myself, nor have I used Social Maven, so I can’t really recommend one for you).
2. A little CSS should be enough to make those links more visible. Try adding something like this to your theme style.css file:

   .integrated-webcomic nav a {
   float: left;
   font-size: 300%;
   line-height: 2;
   width: 20%;
   }