I could mention also, the Bad Elf Pro -
BE-GPS-2200 for those who like the numbers.
Wifi unit about half the size of a mobile phone, self contained = own battery and can be 'chucked' up on a window sill somewhere to WIFI connect with the I-pad, for which it is 'Apple approved'.
Can be charged in use via the 'cigar lighter' / supplied USB cable.
Advantage is several pages / bits of info on the unit's own screen, and is completely independant of I-pad port, leaving it avbl for charging etc.
USD$149 plus postage....
Seems to work quite well so far......
(No, not on commission.......)
Cheers
