Recording a Podcast Conference Call….the options

As I have said previously, I want to start an edtech version of TWIT. One of the first decisions I/we have to make is how we will connect and record our shows. I want to keep the system as simple as possible because I want to keep post-production editing as short and simple as possible. These are the options I see:

–iChat and GarageBand3 (can AIM clients be recorded or must everyone be on iChat and thus a Mac?)

–Gizmo Project (everyone needs gizmo or I could get hit with big line charges, but it does have a built in recording feature!!!)

–Skype (universal but no recording, I would have to mess with Audio Hijack, etc.)

So what should I use??? Your comments are appreciated!