TreoSkey 1.6
(Edit)
Use the Treo Side Keys to Scroll and Select.
TreoSkey maps the following keys in this manner:
Side Volume UP Button -> 5-way UP key
Side Volume DOWN Button -> 5-way DOWN key
Side Button -> 5-way CENTER (Select) key
You can use [Shift] + [Volume Keys] to change volume, or [Option] + [Side Button] to enable or disable TreoSkey anywhere on the Treo.
NOTE: You may need to press [Option] + [Side Button] once to enable TreoSkey in a fresh installation to enable it.