Trisha Reinwald and Jason Striegel don't even know each other, but they'll be spending the entire night together Saturday.

It's not what you think. The two will be part of 16 "blind dates'' made Saturday, pairing about 100 volunteer computer geeks with 16 nonprofits in dire need of website facelifts.

During a 24-hour blitz, the sleep-deprived teams will create state-of-the-art websites. Called the Nerdery Overnight Website Challenge, it's in its third year of bringing out Web wonks for a good cause.

"It's a great opportunity to give back to the community ... plus there's the challenge of being in a room with some of the best interactive developers in Minneapolis,'' said Striegel, who by day works for the Colle+McVoy ad agency in Minneapolis.

Meanwhile Reinwald, executive director of the Minnesota Jaycees, is packing a blanket and pajamas and hoping to take a cat nap. Forgoing sleep is a small price to pay for an extreme Web makeover, she said.

"We've got 80 local [Jaycee] chapters across the state, and it's hard to communicate the impact we make on our website,'' Reinwald said. "We want our home page to make a big impression on the public.''

The event is organized by the Bloomington-based Nerdery Interactive Labs, a division of Sierra Bravo Corp. More than 200 Web volunteers offered their services this year and 50 nonprofits applied, said spokesman Mark Malmberg. Winners, including the Minnesota Senior Corps, Centro Campesino and the Bloomington Chorale, get makeovers valued at up to $25,000, he said.

The event starts at 9 a.m. Saturday at the Earle Brown Center on the University of Minnesota's St. Paul campus. Free meals -- donated by restaurants such as Buffalo Wild Wings and Pizza Luce -- and caffeine will abound. As for Striegel, he'll be relying on bananas and the adrenaline rush to stay awake.

"A lot of us are used to long nights in front of computers,'' he said. "This is a little more normal than we'd like to admit.''

Jean Hopfensperger • 612-673-4511