How to record conversations with MacBook Pro.?

One friend and I have such interesting discussions and later it's hard to remember all the relevant insights we came up with. I'd like to have some sort of voice recorder to capture our insights. No old tape technology. I hear there's software compatible w/ my MacBook Pro laptop called QuickVoice - I guess I could try that but it means having my laptop around. I've also heard there's a voice recorder accessory that attaches to an iPod (but I only have a 2GB iPod Nano, does anything work w/ that model?). Any other recommendations?