The core Meta Widget output 5 links in an unordered list. Most people really only want 1 or 2 of those links. How about adding unique classes to each of the list items - eg
wp_meta_entries_rss so that site owners - who do not have the technical expertise to use something like wp_login_form - can use CSS to hide the links that they do not want?
Yes - I know this could be addressed by using range of different plugins but look at it this way... most core output includes classes that can be used by theme devs & site owners, so why not this widget too?