My TomTom One allows me to enter coordinates as a destination in addition to using an address.

I am not completely satisfied with it however. The on board dynamic memory (32MB) is pretty limited as is the on board flash memory (1GB). This means the POI list is somewhat short, and when I search for POIs I get a short list. I only get 2 or 3 pages of results when doing a search (i.e. for restaurants) where I would expect hundreds of matches. As a result, I have had to type in fairly specific POI searches (i.e. IHOP).