Agreed. I am usually on a two-wheeled vehicle and can't consult a device while en route anyway, so I don't really notice such things unless I'm walking around while shopping outside, etc.
I put my brightness down to 65% or so. Still very bright indoors and ... unplugged from overnight power at 10:30am today, have been in the office and around town, showing off the 7100 to those who know what a BlackBerry is, sending 15 emails and getting who-knows-how-many and browsing news.google.com and providence craigslist...
i don't think I'll go half a week like the 7230, but to be honest as long as I can go out of town for the weekend and not buy a cable while i'm away i'll be fine.