Over the past few weeks, the number of quality inbound projects has dropped substantially. I have a few theories as to why, but as MattBearman mentions, an email mentioning the lack of projects probably would be a good move.
The biggest challenge now is getting quality stuff coming in on a regular basis. I'm also working on fixing a few of the more painful interactions on both sides (talent and project owner).
Admittedly, my weakness is figuring out how to spark growth while at the bottom of the "shark fin" (http://www.longevitas.co.uk/site/images/Shark.png) -- the initial buzz has died down (though, interestingly, we're getting double digit signups a day still), so organic inbound projects aren't happening much anymore, and the ones that are have been disappointing generally.
I hope to have more updates soon.