I would suggest that SEOW is what you're looking for if you've got the time to dedicate on a regular basis (x hours per week). To get the most out of it you will require a large(ish) group of individuals who have the technical knowledge to install all of the web server and database software and the also individuals who will plan out all the missions that are then flown in IL-2. You will unlikely be able to do this yourself unless you are quite tecnically minded.
So, I would suggest that you head over to the SEOW boards to check things out and find a squad that already has everything set up.
Where many campaigns are run:
http://seowhq.net/seowhqforum/index.php
Sourceforge site for SEOW code:
http://seow.sourceforge.net/
SEOW discussion boards:
http://seowhq.net/seowforum/
If you're looking to join a squad I can recommend the guys (and gals) at =69.GIAP= (
http://www.69giap.com/). I am not a member but have had significant dealings with them and their SEOW campaigns. I don't know what's required to get into the squad, but they are an exceptionally knowledgable group that will make you feel like a small (but happy!) fish in a big pond.
Good luck!