We've launched and I've got $5-10k for marketing, advice?
zaidf: If you haven't, read up on Lean Startup/Eric Reis(http://www.startuplessonslearned.com/) and also Sean Ellis(http://startup-marketing.com/).I particularly like the free survey tool provided by Sean Ellis at http://survey.io. Basically it gives you an idea whether you have a service that you can charge for.Bottomline: 
(1) don't assume your product will sell(be open to changing almost every aspect of it)
(2) test, modify, test more whether your product can sell
(3) don't scale marketing until you know from a smaller data sample that there is demand for your product. Simply put, don't scale till for every dollar of marketing spend, you can make more than a dollar. Ignoring that last piece will lead you to having no money in the bank in little time(cough last bubble).