Lookstat is a website which claims to help take away the burden of tracking sales across multiple microstock sites. As someone that does this tracking manually, I'd certainly appreciate a tool to speed this up, although my sales are so low (in fact, have pretty much dried-up!!), I'm losing faith in microstock altogether.
They've recently received $500k of funding, which is admirable. Hopefully they'll use it to develop support from more than the two current sites - iStockphoto and Dreamstime. Long-term, the future will be interesting, as with increasing consolidation between microstock players, there may be less need for photographers to track sales across many sites. They may also have certain resistance from people who aren't so keen to share their secure logon details with a third-party.