Black - Recording with iPhone 4

I like recording stuff... I like hearing it... I like mucking about with music and stuff... iPhone 4 plays stuff back in the following formats.. AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), HE-AAC, MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV

But, what format does it record in?, I dunno?

So, this is a test.. Recorded straight into the iPhone using voice recorder... no mic, no nothin'

Here's the original m4a file (download it and delete it, make yourself feel good!)

And here's a version converted to mP3 using Alto Mp3 Gold - 320kbps


What's the best recording set-up for iPhone? I think I'll try Sonoma's "FourTrack" - anyone used it?