It's a simply proposition:

Check out or hosting offerings at: http://www.theycommunicate.com
The customer interface is fully brandable
Full Ensim feature set.

Registered resellers get 50% off of the list prices
Pay as you go.

or

2 GB h.d.
100GB Transfer
Unlimited accounts
99/mth

The customer interface is fully brandable
Ensim WEBppliance 3.0 for Windows 2000 (.NET compatible) or
3.1 for Linux 7.2

DNS spoofing is available - $20 setup
Shared SQL available - 100MB $10 setup $10/mth/database

Contact
them@theycommunicate.com