Considering MCT Certification

I'd like to be an MCT, but I'm concerned about the 1 year expiration.  It 
seems like a lot of work to go through, just to do it all again a year
later. 
 If the expiration period was 3 years or longer, it might be worth it for
me.

Also, what kind of prior teaching experience do you need?  I don't have a 
teaching certificate, but I do have lots of real time experience helping 
clueless users with stupid problems.  I feel like I've educated enough of 
them to make a difference, but I don't have any type of certification to 
prove it.  I'm MCSE/MCSA/MCP/MCTS certified too.  

I'm trying to decide if the MCT certification is right for me.  Please
post 
your comments.