b and g are wireless protocols. I believe that b connection speeds are 10 mb/s whereas g go up to 50 mb/s
b is the old old protocol, g is newer (but has been around for years), n is the newest.........and is officially still in "draft" form so not very standard at the moment outside of laptops and desktops
but..........considering the time difference between iPhone and ipod touch is only 3 months, and that production of the ipod touch probably began months ago, i can't believe Apple wouldn't give the iPhone b/g wifi as well
Just for discussion sake, it probably wouldn't matter much if the iPhone only had b at 10Mb/s since that is far faster than any Internet connection you are probably going to encounter. The advantage to the g at 54Mb/s is when connected to a network where the exchange of data is between the wireless device and other PCs or servers on the LAN. Bottom line is that b is probably all you really need. My iPhone connects to my wireless router at g protocol speeds, but only sees the Internet at my slower DSL rate of about 3Mb/s.
I agree that I am correct 
but I disagree that the bottleneck is the iPhone. The real bottleneck for most iPhone WiFi speed is the speed of the underlying Internet feed. The iPhone can theoretically pick up speeds up to 50Mb. or so, the speed of the g protocol. But few underlying feeds exceed 10Mb/s, the theoritical speed of the slower b protocol.
This is all really just so much talk because most of us are happy when our iPhone Internet moves along briskly, which for me happens with anything above 3Mb/s or so.
but I disagree that the bottleneck is the iPhone. The real bottleneck for most iPhone WiFi speed is the speed of the underlying Internet feed. The iPhone can theoretically pick up speeds up to 50Mb. or so, the speed of the g protocol. But few underlying feeds exceed 10Mb/s, the theoritical speed of the slower b protocol.This is all really just so much talk because most of us are happy when our iPhone Internet moves along briskly, which for me happens with anything above 3Mb/s or so.
The real question is, what was the choice beverage? 
Well........I can't exactly strut into a bar, whip out my $600 iPhone and order a cheap rolling rock now could I? Nah, we need to represent, hence the imported beers, grey goose vodka drinks, bombay sapphire gin drinks, patron taquila drinks, not the silver kind of course, perhaps anejo, etc...............
well that was all before the iPhone price got slashed.........now at $400 bucks, when ordering rolling rock, i no longer look like a fish out of water
I agree that I am correct but I disagree that the bottleneck is the iPhone. The real bottleneck for most iPhone WiFi speed is the speed of the underlying Internet feed. The iPhone can theoretically pick up speeds up to 50Mb. or so, the speed of the g protocol. But few underlying feeds exceed 10Mb/s, the theoritical speed of the slower b protocol.
This is all really just so much talk because most of us are happy when our iPhone Internet moves along briskly, which for me happens with anything above 3Mb/s or so.
but I disagree that the bottleneck is the iPhone. The real bottleneck for most iPhone WiFi speed is the speed of the underlying Internet feed. The iPhone can theoretically pick up speeds up to 50Mb. or so, the speed of the g protocol. But few underlying feeds exceed 10Mb/s, the theoritical speed of the slower b protocol.This is all really just so much talk because most of us are happy when our iPhone Internet moves along briskly, which for me happens with anything above 3Mb/s or so.