Why should Advent have all the fun with calendars?
The Busted Halo Website has put together a calendar for Lent. 
They call it:

Fast, Pray, Give

Busted Halo's Lenten plan is completely unflunkable, entirely relevant and totally inspiring

Here's Wednesday, Feb. 24:

Check it out:  
http://www.bustedhalo.com/features/fast-pray-give-2010/