I just got challenged and did it yesterday. Due to timing, I'm actually in the philippines right now, but didn't want to waste too much ice/water.
I'm donating $500+company match, and I challenged a couple coworkers, and 1 of them is doing $500+company match as well.
I'm glad I got challenged, as it's a great way to raise money for a charity that didn't seem to get much attention in the past.
My link if you're interested.
https://secure.e2rm.com/registrant/m...langPref=en-CA
Hopefully I embedded the video correctly. Providing link jic.
http://youtu.be/zEU_dWgY5Nw