Elgato's EyeTV software lets users watch, record and schedule TV on their Macs, as well as transfer recordings to the iPod. I've got an EyeTV Hybrid connected to my G4 iMac and it works wonderfully, despite the older processor and modest video card (64 MB DDR RAM). Our own Mike Rose wrote a thorough review in March which you can read here.
Today, Elgato announced EyeTV software version 2.5 (available Sept. 25th), which has some cool features. The most exciting is Wi Fi access to your recordings with an iPhone or iPod Touch. Both can connect to a web server running within EyeTV 2.5 (via Safari), browse the EyeTV archive and playlists and play shows with a touch. Very cool. Other changes include:
One-click export of files for the iPhone and iPod touch.
The EyeTV window can be set to float above all other windows (Yay!)
Improved H.264 HDTV playback (This requires at least an Intel Core 2 Duo processor)
Time-shift recording for analog tuners
This update is free for registered users. Elgato's EyeTV software requires Mac OS 10.4 and at least a PPC 500MHz G4.