Starting February 1st and continuing through the weekend, Activision will be hosting a Guitar Hero 3, "Rock Your Party," sweepstakes.  They'll be giving away a ton prize packages all weekend long which include:

Package 1 (936 available): 

• Guitar Hero Red Flames 2" Wide Custom Guitar Strap, (Approximate Retail Value (ARV), $9.99 USD)
• 500 Microsoft Points (ARV $6.25)

Those who win one of the 936 available are then entered into the grand-prize drawing. Which includes:

• Xbox 360™ Elite system (includes black Xbox 360 Elite console, Xbox 360 Black wireless controller, Xbox 360 Black headset, 120GB hard drive & HDMI cable) (ARV, $449.00 USD)
• LG 50” 1080p Flat-Panel Plasma Television, (ARV, $2,999,99 USD)
• BoomChair – Wi-FX Wireless Gaming Chair (ARV, $99.99 USD)
• 4000 Microsoft Points (ARV $50.00)

2nd place runners up will get:

• Slash signed Face Plate
• 4000 Microsoft Points
• Activision Xbox 360 Game Pack:
  -Call of Duty 2
  -Call of Duty 3
  -Marvel Ultimate Alliance
  -Tony Hawk's Proving Ground
  -Spider-Man 3

And 3rd place runners up will get:

• Activision Xbox 360 Game Pack:
  -Call of Duty 2
  -Call of Duty 3
  -Marvel Ultimate Alliance
  -Tony Hawk's Proving Ground
  -Spider-Man 3

 You can enter here or by downloading the free Guitar Hero 3 Rock Your Party picture pack which consists of the following gamerpictures:

I can't make these out too well but I think there's a football helmet with the GH logo, a football player and a football with the GH logo.  I don't understand the significance of the football theme with Guitar Hero, but they are free.

    You'll also have the chance to play against Guitar Hero devs on Sunday Feb. 3rd from 3pm - 7pm EST.

Complete rules here

Contest site here 

In other news, Will Farrell is holding a contest of his own.  And yes, this is a cheap excuse to share this video.