I've had my eye on the AnyWhereMap from Controlvision for a year or two. It is a PDA based moving map with lots of extra functionality built in e.g. HSI and terrain avoidance warnings. The catch (apart from price) is that the database is heavily US based. The other catch is that I actually quite enjoy navigating by more conventional means (see the 'A to B' thread)!
At the other end of the Gizmo scale, the most useful piece of 'equipment' I have procurred recently is the piece of string that is glued to my pencil and tied on to my kneeboard
. I think the idea came from pprune, but I cannot find the message now. No more scrabbling around underneath the seat for me!
TG