The free open source media player Banshee has hit version 1.4 and now syncs your music and playlists to the G1. It’s all automatic and works much like iTunes does with the iPhone. It even imports all the songs you’ve purchased from Amazon. Banshee as a media app is very sweet indeed, doing all the cool things a music app should with absolutely no fuss. You can read a full review here.
There is a catch. Banshee is currently only available for Mac and Linux. The developers promise to have the Windows version running soon and judging by the rate of development, I’d have to believe them.
You can read all about Banshee and download it from their website.