This is a special event, as it is out of Chicago, but many of us Chicagoans will be travelling to Sunnyvale, CA for this sweet-action event. Be sure to RSVP here, and if you’re a Chicagoan, leave a comment below on this post.

• Friday - Sunday Sept 29 - Oct. 1st in Sunnyvale, CA
• Free to participate, just RSVP here, on Upcoming’s site (Also leave a comment below).
• www.hackday.org

From Yahoo’s announcement:

We’ll kick things off on Friday, September 29th with a free all-day developer workshop. Then we’ll launch a 24-hour Hack Day with an outdoor party into the wee hours, with special guests providing the soundtrack. (Details to come later, but we guarantee this won’t be your usual corporate-wedding-band leading the crowd through 2am group sing-alongs of “Brick House.”) We’ll hack through the night, keep going through Saturday morning, and wind it all up that evening with hacker demos, judging from a panel of luminaries. and special awards for the coolest hacks. We’ll have special guest speakers all weekend, with Michael Arrington of TechCrunch presiding over the festivities. After nightfall we’ll close things out with another round of entertainment that you would be happy to pay for, except that you won’t have to.

Update:

Most of us are taking a Southwest flight (only $110 each way) out on Thursday night and and leaving Sunday morning. Book a flight with us, or leave a post below to split up the hotel room!
Southwest flight details follow: