I second that. I've built a dozen awesome apps and never even took them live due to the burden of having to market them
"I've been doing marketing for national and international brands if you send me a mail me[at]ilkthomas.com with a short description of your project, I'll send you some free tips. "
Since you mentioned apps, my company QuantApps even offers doing all the marketing for a percentage of the revenues if that sounds better to you. Of course if you prefer just some tips that offer stands too.