assignable convenience key on HTC device?

[stockh#AC]

I find the assignable convenience keys on the blackberry smartphones very convenient.

Does anyone know if HTC has assignable side keys on any of their devices?
Evo, epic.....etc?

 

[C01E]

I don't think any recent models have anything like that. I know that you could re-bind some keys on older Windows Mobile handsets from HTC, But have so far seen nothing to do the same on android. But it sure would be nice, (Miss the feature from my old Blackberry too.)