Hi KW802,
Simply the last addition to the gallery and the comment which was made with this last addition. No reply of the comments, only the thumbnail and the original comment.
Parameters needed (some are optionnal

:
-number of last addition
-Name/title of last addition
-Comment on/off
-show thumbnail on/off
-parse links/html/bbcode (to have a nice display if the comment include links, or smileys)
-link to the gallery home or link to user gallery or link to the full post of the clicked addition
A simple exemple : CGTalk.com feed for one of its gallery (well, they use a custum system of feed ) :
http://www.cgtalk.com/external.php?forumids=121
A screenshot of this feed under Firefox plugin Sage in attachement.
Even a simple starting script with only the thumbnail, link and title will be enough

I know that their is a lot of different format for the RSS, and I'm not a coder at all, then, I don't really know if it's a hard work, but it's a miss for such a great system as VBaGallery
Thank you !