Dom
I suppose it depends upon what the role is, but in addition to the others advice above (not all!!!!

) - I'd prepare some information regarding what you'd expect to achieve/learn in the first 30 days there and potentially extend this to your first 60 or 90 days.
For example - explain that you'd want to fully understand the company's processes and functions in order for you to be as up to speed and proactive for the business as soon as possible.
Take a lot of interest in the company and ask about the direction that its heading in and how you'd hope to be part of its future direction etc....
Ask why the role has come about, expectations of you (and the role), functions, responsibilities etc......
Be sure that you take notes, and take a printout of their website page. Stick the printout in a clear folder and casually leave this lying around as you get your notepad out.
Have some prepared questions written down, ask if you can ask questions!!
Give me a call if I can help you with any of this .... 'cause I've got loads of crap ideas!!!
And don't wear the yellow suit
Tim
[Edited on 9-2-2006 by Rattler]