Congratulations on your new venture. We can't say enough good things about Phatservers or Chilihost. For a listing of reliable hosts, please see the section "Hosts who do support the catch-all:" here:
http://bettercgi.com/strongbox/compatibility.html
You'll definitely want to incorporate some sort of password protection/anti-slurping system on your website. Please consider us for your needs. We are also now offering a new product to protect against bandwidth abuse, which can save you tons of money in the long run.
Password Protection:
http://bettercgi.com/strongbox/
Bandwidth Protection:
http://bettercgi.com/throttlebox/
We hope to hear from you!