My two cents:

1. geo.com

(obviously the gold standard and far superior to .tv, but somewhat irrelevant to this discussion, because if you could afford to build these types of networks in geo.com, then why are you in this thread and not in the Caymans with Frank Schilling? Seriously, we are probably talking about a 10 to 50x markup vs. the .tv)

2. geo.tv

(the best .tv by a good margin, in my opinion)

2. geotv.com

(most domaineers today would take this over geo.tv, but I like geo.tv better in the long run. If .tv "works", it is a more intuitive name. Obviously this is the gamble that everyone here is taking. if .tv does not "work", then this same problem is true for all our .tvs)

3. geotv.tv

(no real equivalent in .com. you would never see geocom.com. Good defensive registration for geo.tv. Has some value, but will have huge bleeding in development to geo.tv. I agree with EQ that at some point you would rather have largegeotv.tv vs. smalltown.tv, but where to draw that line, I have no idea).

4. citynamestateinitials.tv, eg. bostonma.tv

(I don't love it. I think this was a case where Local "inflated" that market a bit temporarily, albeit at pretty low levels. The reason I don't love it is that you don't see those sites being successful in .com)

5. mygeo.tv, igeo.tv, egeo.tv, coolgeo.tv, etc

(at this stage, worthless)

Just my opinion. Obviously if you are local and willing to hustle, you can make any of these work, just look at portlandme.tv for example. Because he was local, he was able to get the local TV station partnership.