i use a form made available by the Podcast Brothers. i don't want to be the starting point of some ranting screed here, but i think its smart to explain to people ahead of time that you will request that they sign one. i find it helpful to email it to them a few days before a shoot.
the Podcast Brothers have a podcaster template library that is useful: http://www.newmediaexpo.com/audio.htm eric. www.realworldgreen.com www.gardenfork.tv
