Rather entertaining!

Maps at live.com

A friend of mine used this to show me where he grew up. I then spent the next hour putting in addresses and looking around. Of course it gets our location wrong - I expect that now of about every map service - but knowing what you're looking for, it's usually easy to find it.

Put in the address, then click bird's eye view. You can zoom in or out, and you can rotate view. I spent a while "driving" (click and drag the hand) around my hometown, looking at the first house I remember, then looking at the lake downtown, then following one of the roads out to Acme, etc. If it seems to pause while loading, don't just sit still waiting - continue to move the view some, and it'll load. At Acme, there was a black square where nothing showed, but when I rotated the view, it came in.

It's easy to lose track of time!