24 Hour Challenge for March

I am newish to groups and forums on MFP. I have been noticing postings for 24 Hour Challenge - Feburary, and other months, and I think this is something that would be good for me. I need all the help I can get motivating myself to get active and I think having an ambitious goal to meet would be the push I need. Is this an active group thing or does everyone that wants to do it just post on the message board daily?