These are from the February 14, 2005 program.
The first one is kinda funny, as well as being newsworthy and rather informative.
The second clip (movie on the DNC convention) just isn't all that funny, but it's still sort of informative.
Dean Wins The DNC - Daily Show (5 MB)
Audio - Dean Wins The DNC - Daily Show (3 Mb)
Daily Show Movie On DNC Conference (7 MB)
Audio - Daily Show Movie On DNC Conference (5 MB)