I play travian.com
and ikariam.org
They both similar, but getting the source codes for it are impossible, as they are run by a more legitamate company.
There is someone that got really close to their system, but the graphics is what needs help.
the site is devana.de
it is an opensource game, run by 1 person, which has about 300 members, and has been out for only a couple of months.
The graphics is all the game needs to be a great hit like ikariam.org and travian.com
I am maker103 in forums, for it.
I have had that game tested it through my site, that I made through x10hosting. It is quite easy to run and has alot of potential to make money, through things like ambrosia in ikariam or gold coins in travian.com
If you want some more info on what I have done or can do with these sites, and how I can help you with the devana.eu game, that is open source PM me if you want, but first I suggest you try travian.com
as it is more similar to that but also similar to Ikariam.org
Edit:
Starshine did you try what I sent you?
Like I said, the graphics are not great at all, but that is only thing holding it from making tons of cash like ikariam.org or travian.com