Frito-Lay of North America presents a Snack Strong production that you won't soon forget.  This truly unique and innovative use of multiple online medias is a really cool experience (especially if you like scary movies and such).  The site, Hotel 626, requires you to use a webcam, a microphone, and register with the site so that they can immerse you properly into this hellish nightmare.  Don't worry it's not that hellish.  In fact, it's pretty fun!
The site runs entirely on flash, and utilizes your webcam to make sure you're playing in the proper conditions, namely with all the lights turned off.  As a bonus, Hotel 626 is only open at night time, from 6pm to 6am, so you won't be getting out of the creepy factor too easily.

After you register with the site, you'll be allowed to enter Hotel 626, which starts off with a disturbing jump out of bed due to some strange noises.   The game is played in 10 chapters, most of which utilize some form of media interaction.  You have to pay attention very carefully for clues in the cinematic scenes that will let you solve puzzles and survive the horror.  One stage tells you to flash a goul with your on-screen camera, one asks you to sing a lullabye, and one requires you to sift through pictures until you find your own.  There's also one part with a creepy phone call that will help you escape Hotel 626, so make sure you have your cell nearby.

There aren't many sites that take full advantage of different types of interactive online media the way Hotel 626 does.  It really is a fun and challenging game, and if you make it all the way to the end, you can even share your journey on Facebook and Twitter.  After work tonight, definitely check this one out.  You'll be impressed with how well this site works, and how engaging the game becomes.