ok here are 2 different questions:
1) what programs do you reccommend to get audio input from vinyl (or essentially anything else)?
It depends on what kind of computer you have.
my G5 has a good enough sound card, so I just downloaded audio recorder from version tracker.
Plugged turntables into the 1/8 inch jack in the back, and that's it,
That's the free route anyway.
Other than that, you can start shelling out $ for apps like audio Hijack, and sound soap(way too much $)
You can also just record straight into garageband and export to iTunes.
pretty easy stuff. 😀