I'm not worried about warranty. Besides you can always flash a official rom back right?
Checked up some more on rooting and it doesnt seem too usefull yet? Removing default apps you dont use and move the cache to SD card seems to be the most usefull at the moment. And maybe running apps from SD though that doesnt seem fail safe and google is working on that anyway right?
Sorry for the questions. I get plenty of experience with WiMo but this will be the first time I get a android phone so its kinda like having to learn things all over again
On WiMo its sooo each

Just flash and find you .cab's and your good to go. About that, does android actually have some decent copy protection? or is it like wimo where you only need a .cab or the iPhone that also runs whatever you want after jailbreak?