not sure this enters as what category, but maryanne amacher! -- making the ear produce its own sounds is pure genius
and therefore her teacher, stockhausen
also, alvin lucier
none of these artists qualify as a "band" from the 00's (though amacher had her 3rd ear releases) but eh
also
double leopards
sunburned hand of the man
sunn (i'll skip the unpronounceable part)
o wait guest already said double leopards-- and birds of delay!
nautical almanac, then
agata (from melt-banana) has some great solo stuff
16 bitch pileup came & disappeared and i always wanted a re-listen
more towards the techno-pop-punk then (i saw the name of times new viking, a bit too commercial for me but whatever) les georges leningrad were great
btw scott v if i recall has/had a massive connection to the noise scene. i think he only comes here to shake his fist at the kids these days, but someone could PM him he might like something with a purpose
also, see here:
http://www.heresee.com/tarantulalink.htm