G1 - No Headphone Jack

Unfortunately, video and song playback is hampered by a major hardware shortcoming: the G1 eschews a standard headphone jack in favour of an included but uncomfortable earbud headset, which plugs into the mini USB port that is also used to charge the phone.

This poses several problems, as you can't use your favorite headphones without an adapter and it's impossible to charge the G1 while listening to music or watching videos, unless you want to use the included speaker.