for those who haven't rooted, the dual touch update is available via PC Companion. I just took the update and can confirm it is working.
X10a
firmware: 2.1 -update1
bseband: 2.1.55
kernal: 2.6.29
build: 2.1.1.A.0.6
it's does start off sluggish after taking the update. it takes a few minutes but now it doesn't appear any faster or slower than before.