paraipan,
are you familiar with Eric Hammond's fantastic blog Alestic with many useful AWS tips and scripts.
I been using a version of this script to back my master and replication databases daily and hourly for years.
http://alestic.com/2012/02/ec2-consistent-snapshot-on-githubIt it database specific but it may point you in the right direction.
I will look into it right now, thank you
Edit: It worked, thanks BCB. Now I have to figure out how can I delete the snapshots regularly.
Say hi on Rugatu and the reward is yours, can't take it back now.