Of course I think RandomPownce.com is awesome, but another site that I find interesting is PownceMeme.com.
Bryan Pearson (@bryanpearson) has put together a very nice looking site that shows the top rated posts on Pownce. The nice thing about the site (vs. RandomPownce) is that Bryan actually displays images and videos rather than just showing the links.
I'm not sure how Bryan rates the posts, I thought I had it figured out at one point, but it looks to be based on some formula using their star ratings, number of recipients and number of replies.
It's interesting to compare the two sites and see how two people are uniquely using the same basic set of data. Bryan's site looks at the data real-time (shows posts over the past 24 hours). I display yesterday's top posts. It looks like Bryan uses an automated process to rate the posts whereas I rate them using my own personal judgement, most of the time on a whim.
If you like RandomPownce (or RandomTweets or RandomJaikus) then you'll probably like PownceMeme. Give it a look. It is a fun site and pretty addictive. I find myself visiting at least once a day.