It would be useful to have the option to reply to a topic while using the Lo-Fi version. Users of PDAs or mobile phones will apreciate this feature (maybe do it selectable on the control panel on a per-user basis)

I agree. I actually use the Lo-Fi version quite often, and I'd love to be able to reply to topics through it.

I agree, would be nice to have all the features of IPB available, just through the lo-fi interface

would be even better if the lofi Style can Extend to IPG, IB, and when its released, IPD.

Well... IPD will be more of a Content Management system for MAKING the Dynamic Content...
But if it had an easy sysytem for making a PDA/Cell compatable site, then yes, extend it.