I started to play Illarion but I had 2 reasons I stopped before it got running.
1.I get errors such as no support for 32 bit depth in my resolution and an exception.
2.While ooc is possible to have an IC explenation, i want to be able to say the ooc explanation in brackets. also, It appears guild chat is IC. lots of things involving the guild that are ooc are in most guild chats (I think)
And if some a open source game to role play in, voozu (mmorpg.myfanforum.com) may do well, despite being far from finished and being an RPG till we have the basics.