I think you just need to do things like you are doing here on Trulia.
I've had a lot of great contacts that were generated through Trulia, including numerous investors and potential renters. I also have some great lenders that I work with so the loans can happen easier and a number of fantastic, reputable builders that I also deal with on a regular basis.
In addition, you will want to ally yourself with a realtor(s) that have constant contact with first time home buyers or really just buyers in general. I have several listings and I work onsite at a number of communities so I do come in contact with many prospects both from the communities and from my listings. Buyers and renters are generated from all fo those. From the feedback I have received, the rental market looks hot but the buyer's market is getting hotter.
Muffley & Associates
#1 Selling Keller Williams group in Atlanta 2007
#2 Selling KW group in South East Region 2007
#21 Selling KW group in the Country to date 2008