Well, I used to collect PC racing wheels. I've probably spent a few "G's" on these things, but they do make racing online really fun.
Got ones from Thomas Wheels (TSW Modified),
http://www.thomas-superwheel.com/prods/01mod.html
&
ECCI (CDS4000 Monza F1)
http://www.ecci.net/ecci_25.htm
I've also got ones from Microsoft, Thrustmaster, MOMO and MadCatz.
The only thing left now is to add an actual 'racing seat' and I'll be good to go. I'm thinking this one hear might be pretty good:
http://www.virtualroadster.com/features.htm
Well, that's about it for me.
TekArt