hi Eddie,
A couple of Ideas you can explore although I do not know if you are using Callmanager express or callmanager and how these ideas can fit into your design....
1>you can use plar or hotdial as soon as the phone goes offhook it dials a preconfigured number.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_configuration_example09186a0080232b9f.shtml
2>have an XML app to do this, and have it be under services, or as an idle URL that allows you to push one of the softbuttons to accomplish this. It would have to place the call from our apps engine, or somewhere, but not apply ringback to the phone (supervised transfer user that pushed the button would be on hold).
http://developer.cisco.com/web/cdc
Hope this helps!
Thanks,
Karthik