Hi, since Nokia has released a Sirf III model of their GPS it should be the obvious choice for 770 users.

They include a car-charger also, which is compatible with the 770, DC-4.

A removable battery that can be replaced in any mobilephone store is also attractive to me. 15h of uptime is also impressive.

It mentions that Series 60 phones can show a battery meter on the display, so it might be something for MaemoMapper author to look into to implement. It looks quite cool also, and is the cheapest Sirf III receiver I found so far, 860SEK compared to about 1100SEK for the Holux 236.

Just my 10c...

Regards, Rune