1.) the alpha masking should be toggle-able or at least setable from the admin screen. I always invert it or turn it off altogether.
2.) It would be nice if there was a 'user_icons" folder that would safely survive upgrades. (i have several sites that demand ie6 usability, for which I have to replace the icons with Gif's... even nicer if, whey you selected one of the site blocks on the admin page, if there was a toggle to expand that item, and a.) upload a new icon, b.) provide and customization available for that site
3.) It would be great if the plugin automatically detected if the article2pdf plugin was avaialable and allowed you to replace the PDF link (eg:
'url' => the_permalink().'&article2pdf=1')
4.) ditto customizations for 'print' - if a theme defines a 'print' format stylesheet and/or template, then that will likely provide better results than printfriendly.com
5.) a widget should be included. yes, many people will use the inline stuff, but a widget is a ncie way to work with sociable too. (I currently just use the php code widget, and then do something like this:
echo sociable_html(Array("Facebook", "Twitter", "MySpace", "Digg", "Google", "del.icio.us"));
echo sociable_html(Array("StumbleUpon", "LinkedIn", "email", "Print", "PDF", "RSS"));
which gives me a nice chunky two-line widget block on the sidebar. so users always know where the share stuff is, because its ALWAYS in the same spot regardless of page, post, home, category view etc...
6.) It would be great if you removed the Yoast feed from the dashboard, and if you MUST provide a dashboard feed block, please allow it to be turned off from the admin page (yes, I know it can be removed from the dashboard, but that is a per-user setting; it would be better if the plugin admin page globally toggled the feed inclusion)
7.) a 'favourite/bookmark' (eg, the built in browser/non-social "bookmark" as an option would be nice too.
Thanks for taking on sociable, its a 'must have' plugin that can only get better!!