You wouldn’t think that disaster relief and comedy would go together, but a lot of famous funny folk are starting to organize fundraisers for the victims of Katrina.

According to MTV News, Steve Harvey (who co-hosted BET’s ”SOS (Saving OurSelves)” concert last Friday) is emceeing the Sept. 26 ”Saving Lives With Laughter” show at the Forum in Los Angeles, topping a bill that includes Wanda Sykes, Mo’Nique and Mike Epps.

Also in L.A., on Sept. 22, Tenacious D are hosting a fundraiser at the Wiltern LG theater for the American Red Cross, with guests David Cross, Sarah Silverman, Fiona Apple, Dave Grohl, and Queens of the Stone Age‘s Josh Homme with Jesse Hughes (his bandmate in Eagles of Death Metal).

Even the semi-reclusive Dave Chappelle is pitching in. He’ll appear at a Sept. 19 hip-hop benefit at B.B. King‘s Blues Club in New York hosted by rappers Dead Prez. Also on the bill are David Banner, Q-Tip, Talib Kweli, Remy Martin, Memphis Bleek, Styles P, the Last Poets, the X-ecutioners, the Beatnuts, and Bazaar Royale. Proceeds will go toward Mississippi relief organizations, including Banner’s Heal the Hood Foundation.

Meanwhile, the not-funny Pearl Jam have scheduled a rare club date for Oct. 5 at Chicago’s House of Blues (where Twista is headlining a benefit on Monday). Tickets will sell for a not-funny $1,000 a head, with funds earmarked for Habitat for Humanity, the Red Cross, and the Jazz Foundation of America.