I had an SMS chat application installed, but deleted it. I found I like the way the Blackberry stores it by default. The setup is quite clean. Each SMS has a history that is like the conversation in the SMS chat applications anyway.
I still very much like the keyboard and screen. I discovered that it can play XVID video with no conversion, and can play AAC audio as well. It also can play x.264 video and plays iTunes non-drm video just fine. Well, Handbrake rips directly to iTunes format, as do many tools these days. With the hot-swappable mini-sdhc card, it is actually a pretty good media player.
I still periodically entertain myself by starting the one video that inexplicably reboots the device, but nothing is perfect. As a matter of fact, this thing is good enough I've sold my iPod Touch. Seriously. I've also sold my backup e71 because going to that would be so painful anyway.
Besides, I still have the Centro, which, were it not for the Bold, would be my new favorite device. It does everything Palm is supposed to do, and, even if its keyboard is nearly unusable, especially compared to the twice-as-wide Bold, it is ok for SMS, and I never did email on Palm OS anyway. The size is nice, although it really isn't any smaller than the Treo 680 or 650. It feels smaller. It weighs about the same, but feels lighter. And, thankfully, it is a lot less fugly than the Treos. Other than that, it's pretty much a gimped 680. Don't get me wrong; all the capabilities are there, but the whole experience has been dumbed down for Palm's target audience, which seems to be tweens and soccer moms looking to trade up from a featurephone.
However, every time I pick up the Treo to do something, the adorable clunkiness of Palm OS makes me put it back down and pull out the Bold.