One of our core features here at Twidl.it is to make sharing of twidls very easy. One of the components of this is the retweet button. There are two notable competitors in this space. Tweetmeme and Topsy. I will recount why we chose the former.

++ people are already familiar with it therefore it will likely be used by viewers
- the default url is too long (thankfully you can use bit.ly)
+ the buttons look nice beside facebook share button (topsy has the same color as FB)
+++ the traffic to their site is above 1m
+ the intent of tweetmeme.com’s audience is to DISCOVER things to view. topsy SEARCHES for specific stuff.
- tweetmeme’s api allows 3rd party to integrate analytics. (not sure if topsy supports this)

WINS!

next match: wibliya vs meebo bar!