PalmPilot's Canadian Red Box
The PalmPilot is a versatile palmtop computer made by 3Com. It can function as a Red Box with just seven lines of code using the cbasPad freeware BASIC interpreter available from: www.nicholson.com/rhn/.
Here's the code:
#autonum new for a = 1 to 5 sound 2200, 33, 64 sound 1, 33, 2 next a run
It doesn't get any easier than that.
Unfortunately the Pilot cannot generate DTMF without serious hardware modifications so people outside of Canada will have to wait for a third-party add-on.