[FizzyWater]

MJD has a series about a female mermaid named "Fred"...

Casey Daniels has a series that has what seemed to me to be the same kind of humor as MJD - it's about a woman who is a tour guide in a cemetary who, after a fall and bump on the head against a tombstone, she sees dead people who want her to solve their murders.

Candace Havens and Madeline Alt write witch series that strike me as similar humor to MJD. Mindy Klasky, too.

Have you tried Janet Evanovich's "Stephanie Plum" mysteries? The series has become same-old-same-old, but reading the first four or eight are still worth a giggle, IMO.

Jennifer Skully wrote a "screw-ball comedy" called "Sex and the Serial Killer". I really don't know if it's funny or heavy - I just couldn't get past the main concept! And she does tend to write "hot", although I don't remember if that's true in the "screwball" books she wrote for HQN.

Finally, I don't know if you read romance, as a rule, but sometimes I like to intersperse the heavier urban fantasy's with a light romance. Julia Quinn tends to be fairly light (Brighter Than the Sun?)

But if you really want silly vamps, I think Dakota Cassidy has a couple of humorous vampire stories. Probably more sex than you're looking for...but hey, MJD was originally released by Ellora's Cave, too!