I use for recording internet radio stations on PC the following programs:
1. Radiotracker Platinum Edition 3.0.62.0
2. 3aLab iRadio 1.5.0.516
3. Audio 180% v3.0

They can record anything, any streaming audio format.

For PPC we have Resco PocketRadio 1.71

But: I encountered a lot of radio stations using a codec not supported by Resco PocketRadio, but playable by CorePlayer 1.1.1 Build 1600.
But Core can not record.
I wonder about your experiences with other softwares or packages capable of recording internet radiostations or even more, streaming video.
It would be nice to share your experiences.
Thank you !

I tested some audio recorders to try to record the sound from Core Player or GSPlayer.
Some results:

Resco Recorder can mp3 160KHz or 320KHz, but... MONO only!
Vito Voice Note or Sound Explorer can mp3 stereo but max 96KHZ
The included FSC Recorder can in theory 172 KHz Stereo, in practice it stops after 2-3 seconds and garbage recording.
So for those wishing to record on a PPC an AAC+ 128 KHZ or higher, no chance!