This is my list of platforms I couldn't get modded into XR for whichever reason. But I just don't have the time to get them working in GSA. Figured I'd share so the devs can have a go.
Haven't checked all these out in a while, but I most of them support a blog in some form.
VLD Personals
"Powered by vldPersonals"
"/blog/view/" "Latest visitors" "Member login"
SkaDate
inurl:"/blog_post_view.php"
EFriends
"Thank you for using E-Friends. Please come back soon. "
JomSocial
"Get Connected!" "Recent activities" "Latest Groups"
iScripts SocialWare
"Powered by iScripts SocialWare"
Xitti
site:.xitti.com
E Meeting
"Dating Software Powered by eMeeting LLC" "dll=blog"
"index.php" "dll=blog" "blogs"
Chameleon
"Hot Searches" "New Blogs" "Most Popular Bloggers"
"New blogs" "Active blogs" "/blogs.php"
Spruz.com
site:.spruz.com "Member Login" "Register"
Wall.fm
"Wall.fm Social Network Builder" "/blogs" "user blogs"
LiveStreet
"Powered by LiveStreet CMS" "Topics" "Blogs"
Unknown
"blog.php" "user=" "blogentry_id" "View All Entries"
PeoplePods
"Powered by PeoplePods" "By using this site you agree to not be lame."
Crowdvine
"Browse Members" "Powered by CrowdVine - create your own social network"
If some are already supported, apologies, but I don't have time to check them all :D