damn looks like you are nearly done with it how long have you been working on it?
I've been working on it for over a year with about a 7 month break due to buying a house.  I'm juggling the two.
you started any artwork yet?
Not yet.  I have a few ideas, but i'm undecided.  Debating on keeping it simple and black on the sides??  That would seem a bit plain though.
how are you keeping your steering wheel attached to the base to stop it from moving?
The cabinet came with some clamps with the existing panel.  I will create other sets as I need them.  I can take pics if you need an example.
is that the model mad catz steering wheel that can work on the PS2 and PC also?
Yup, its a mad catz.  It works with gamecube and ps2 as well.  You would need a 'console to pc' converter if you wanted it for the pc?  Not sure if that would work as I have had not much luck with converters myself.  I have a separate steering wheel for the PC that I would probably create another panel for anyway (its been gathering dust for years).
I know what you mean on the taking forever part.  I try to dedicate a bit of time here and there when I can....