Hardware:
1. Billionton Bluetooth Card works fine with my Nokia 6021.
2. I have DCF 660W WiFi card, but not 650W. The first one works fine. However, both these cards are based on the same chipset Prism2/2.5/3, so I believe there will be no troubles.
Software:
1. FBreader works fine with cp1251 charset
2. Remote desktop works fine, rdesktop deb packet fetched from the EABI feed.
3. I use Mplayer for multimedia purposes, works fine for me.
4. No problems, all you need is to apt-get dependent source packets.