��������������������As the holiday season approaches, Silicon Valley companies are partnering to make social media history in support of an amazing cause: UCSF Challenge for the Children. As we covered before, the team that gets the highest number of contributors (with a minimum donation of only $10), will be able to gift and name �a4���AThe Link,�a4���� a children�a4���a4�s activity space for learning play and discovery in this new hospital.

To really get this competition moving, HP is launching a mini-challenge that kicks off today. HP will match every single donation made between now and midnight Dec. 12th PST. Any donation up to $10,000 will be matched! Meaning, HP has offered to support all levels of contribution to the children&'s hospital, whether it�a4���a4�s $10 or $1,000.

Not only will HP be matching all donations made up to $10,000, our own Michael Arrington will be personally matching the first $10,000 in donations through TechCrunch. Since there is heavy competition (Zynga has raised $280,000 through 62,000 donors in only 24 hours!), we�a4���a4�re not done yet. MC Hammer has offered to give away 50 CardWoo gift certificates.

You can help too. This is an amazing cause and the startup or person that helps us get the highest number of total participants over the duration of the drive (by referring other donors through Causes) will be able to name the hospital room for our team. Of course, we will be adding another special prize for readers who donate to our team. For this week, we will give away 2 tickets to the Crunchies Awards to a donor chosen at random. If you&'ve already donated, you can double your chances by donating again. The deadline will be Friday, Dec. 10th at midnight PST.

Please help us by making your donation here!