I do not like flash, but it is so pervasive on the web, that Apple refusal to support it makes the I-phone not much more than an overpriced walkman/phone combo.
I was tempted for the longest time, but resisted. A few of my friends have I-phones, and after toying a bit, figured it was overpriced and incomplete. I just purchased the Atrix a few days ago, and it trumps what I have seen on I-phones, hands-down. This thing has a real HDMI and USB port, not an overpriced proprietary port to gouge you at every turn. The biggest caveat, to me, is the Media Link sync software from Motorola. It's quite awful, but it is nowhere near as restrictive as I-Tunes, which I also despise with a passion that cannot be expressed.
I believe that choosing an Atrix is a no-brainer, but I must confess that I'm not much of a hacker. Rooting is not in my plans either. I don't think my phone's locked-down; my provider seems to be less restrictive than AT&T, but I could be wrong.
The phone lacks support for FLAC audio, but it plays CD audio's native WAV files, and it's DAC yields quite a good quality playback when used with decent earphones. Playing media on the TV via HDMI is straightforward and works beautifully. I'm using
Opera mini as browser,
Ulysse Gizmos for GPS,
Epinephrine for messenging,
AndRecorder for a Dictaphone and the default apps and widgets for the rest. On my version, there is even a ready-to-use app to tether Wi-fi devices to the Internet using the phone's data connexion.
Just my 2 cents.