337. PostSecret
It's no lolsecretz, but at least it's still going strong.
Also, I just found this: PostRejects, which is a pretty good PostSecret parody site that just started.
I guess this week I'm running some kind of 'link to sites that don't really need my support' theme. Another site that meets this criteria: Wikipedia, where I got this public domain picture of an Eagle.
Also, I'm trying out adding advertising to the site. We can talk about it tomorrow.