Rooted 2.1 vs rooted 2.2, in many ways, but I have to emphasize that I've had only Kaos and Cyanogen Tazz in my Eris as far as Froyo goes, and over a dozen 2.1 ROMs. XTR has always proven the fastest, even not overclocked, and most stable of the 2.1 ROMs I've flashed, but now I have had a chance to see its performance as compared to two great Froyos, and I dare say that when I recovered 3.0.3 this morning I was startled as to the speed (again); getting accustomed to the overclocked and tweaked to death Tazz, I was certain I'd achieved similar quickness and efficiency in menu handling, app starting and camera operation as with XTR. I was wrong, and by a long shot, which speaks well to how we do become accustomed to our rooted ROMs as we optimize them and toss apps we don't want, overclock and make our menu selections for speed, etc. Having said all of that, I have to reiterate something: Froyo can work fairly well wrt speed on an Eris as long as it is overclocked a bit and as long as the rooted user attains some savvy as to what stock apps should be replaced for daily use. - Camera Magic works in 2.2, the stock camera will have you wondering what to do about pics). - Mms works fine in some Eris devices running 2.2, but posted reports show a majority with non-functionality. - Gallery will load and properly display its contents after a live battery pull, but then the strange, Peter Max-like thumbnails will re-appear with a simple turn of the device to landscape mode and back; a big disappointment and also a useless app since the thumbs, at that point, lose their screen-touch response and banging on the screen gets you nowhere. Froyo ROMs we see around are a testament to the cleverness and resiliency of developers out there; my hat is off to them. However I think that, for the Eris with its limited resources as compared to the devices 2.2 was conceived for, Froyo will have to be changed in a fashion which brings its core a step back in the direction of 2.1 if it is to fully take advantage of what rooting has to offer. For now, rooting gives us light-speed in 2.1, but in 2.2 it gives us tolerable speed at best.