You'd be surprised...
I guess the advice in here is pretty solid: pick some simple three or four-chord songs with a steady rhythm and just practice singing the vocals along with it. I found songs by Travis and Oasis (no surprise there, considering it's me) to be good for that sort of stuff, because they usually have an acoustic guitar and are fairly straightforward rhythmically. Before I had the gumption to sing while playing, I used to hum or whistle while playing the guitar, and I found that to be a decent compromise.
Guitars: Gibson LP Studio, MIA Fender Precision, Carvin C350Originally Posted by Spudman
Amps: Genz Benz Shuttle 6.0 + Avatar B212 / Genzler 12-3, Acoustic B20
Pedals: Pod HD500X, Diamond Compressor, Tech 21 VT Bass, Sonic Research Turbo Tuner