TweetMeme is one of those twitter sponge sites actually grabs content off your site via links from twitter via their servers at DediPower Managed Hosting.
Multiple IPs coming from a cloud computing situation it appears:
89.151.84.*
89.151.116.*
Reverse DNS is always to *.favsys.net
They just tack on "TweetmemeBot" to the end of a normal UA
"Mozilla/5.0 (compatible; MSIE 6.0b; Windows NT 5.0) Gecko/2009011913 Firefox/3.0.6 TweetmemeBot"
robots.txt: NO
