There are three debates left as of this date. I also include the state election dates with an additional bit of information on what states use electronic voting and whether they offer audit paper trails for the primary vote. Note: Kansas uses no audit in their electronic voting, but they are doing a caucus.
January 15, 2008 – Las Vegas, NevadaThe Caucus of African-American Nevadans and Impacto will host a Democratic debate in Las Vegas.
Telecast on MSNBC
Timings : 6:00 - 8:00 pm PST.
January 21, 2008 - Myrtle Beach, South CarolinaThe Congressional Black Caucus and CNN will host a debate in South Carolina.
January 31, 2008 – Hollywood, CaliforniaThe Los Angeles Times, Politico, and CNN will host a Democratic debate in Hollywood, California, at the Kodak Theatre.
http://en.wikipedia.org/wiki/Democratic_presidential_debates,_2008The states that vote/caucus near that time:January 19, 2008Nevada - caucus
January 26, 2008South Carolina - primary
February 5, 2008Alabama - primary
Alaska - caucus
American Samoa - primary
Arizona - primary
Arkansas - primary
oCalifornia - primary
+Colorado - caucus
Connecticut - primary
Delaware - primary
oDemocrats Abroad - primary
Georgia - primary
oIdaho - caucus
Illinois - primary
+Kansas - caucus
Massachusetts - primary
Minnesota - caucus
Missouri - primary
New Jersey - primary
New Mexico - caucus
New York - primary
+North Dakota - caucus
Oklahoma - primary
Tennessee - primary
oUtah - primary
+ Require electronic voting machines to produce a voter-verified paper trail
o No audit requirement
Red - No audit requirement
http://www.verifiedvoting.org/