My brother's a guitar player, and sent me a jazz song he'd recorded in Audacity. I added drums first using the Impulse sampler in Ableton Live, then played some basic chords with the Hammond B4 patch of the MDA JX-10 soft-synth. Finally, I exported the whole thing and laid down a bassline in Cubase.
On the whole, I think it sounds quite good--better than most of the recordings I do. I'm tempted to start doing more singer-songwriter material outside of the Four String Riot rules.