More than 300 investors, press, and paparazzi will join us at the 500 Startups Secret Lairfor our first ever Demo Days! Our little monsters from the 500 Accelerator Program and a few special guests from our seed companies will be presenting their latest and greatest to a captive audience.

Good things happen in 3’s, so we are actually holding 3 sessions of Demo Day to accommodate the demand – once today (Wednesday April 6), and two more tomorrow (Thursday April 7).  And great news for those of you who can’t make it in person: We’ve decided to broadcast the Thursday sessions! Be sure to tune in LIVE tomorrow atwww.livestream.com/500startups at 10:00AM PDT and 5:00PM PDT for all the action.

Once our Demo Days have come to an end, look for a complete wrap-up of this week, including a closer look at the startups that presented. In the meantime, follow the fire hose of tweets from @500startups. #500Strong

P.S. Startup geeks and DJs – we’re taking suggestions for your favorite startup anthems and videos. Tweet URLs to @500startups with hash tag #500Tunes.