Just found this on the DREAMActivist website. Thanx for the phone numbers!
You can also email each senator at (name)@senate.gov

DREAM Act Target List - Updated 12/17/10
Senate Democrats:

Conrad (ND) - 202-224-2043
Pryor (AR) 202-224-2353
Manchin (WV) 202-224-3954
Hagan (NC) 202-224-6342

Senate Republicans:

Brownback (KS) - 202-224-6521
Voinovich (OH) - 202-224-3353
Snowe (ME) - 202-224-5344
Collins (ME) - 202-224-2523