Want a really nice SIP phone, but need the 'safety-net' of a regular land line?  This cordless DECT phone also connects to a regular land-line. 

The guys at RTX have unveiled the new "LAN Cordless DUALphone". 

This cool device also shows on-screen information, which could be weather, traffic, sports results, etc, in real-time!

All you do is connect the base station to a conventional phone system and also to a broadband network.   You can get calls from via both VOIP and the landline.