As far as I know, with the exception of Nokia and some Sony-Ericson devices, no others notify about receiving a call made on a diverted phone.
That is, if I have 2 numbers (A and B) and A is diverted to B, if I receive a call on A I don't see a "diverted" icon (or sign of any kind) on the phone with number B.
Still no solution or software for this?
P.S. Also when you call somebody and you are waiting on line (the other party has "call waiting" activated), there is no "waiting" sign to notify you.