The GOTO menu option should be a very convenient way to get to a specific spot on the map. The coordinates option provides that -- if you know the coordinates. The cities feature seems to be extremely limited. It only seems to know about major cities... but there are lots of more obscure places that I might want to go.
I propose/suggest/beg for this:
Integrate the "populated places" info from http://geonames.usgs.gov/domestic/download_data.htm
(under the Topical Gazetteers subsection) into the GOTO menu. We could first choose a state to narrow down the list, then choose a populated place by name.
For those of us in the US, it would make finding the locations of small towns much easier. The format of the freely downloadable file contains the names of thousands of populated places and their coordinates, but the data might need to be massaged a little to work right. (It's delimited with the "|" character)
Anyway, incorporating this data into Topofusion would make finding even obscure US towns or villages a snap. It would mean no more hunting for the nearest large city or trying to look up coordinates manually somewhere else to enter into TopoFusion.
One other suggestion, although perhaps less useful, would be to have Zip Code and/or Area Code lookups on the GOTO menu as well. Personally, I'd find the Populated Places much more useful than either of those though.