Eh, Cerej, how much predefined backstory, in pages, you ideally need?
Im not a big fan of writing up something right away, as it usually conflicts with GM a lot.
It would be much more conventional to just bounce a few things, basic, with GM in real time, over IRC or something, than just writing few pages owrth of backstory and information and then scrapping it because it conflicts with GM.
At minimum I need a paragraph about who your character is, and why s/he's gone to Thornvine Forest. Feel free to actually give your character a starting quest. I can't promise the first adventure will be about it, or even the second. But it gives me ideas that fit your character (and anyone else's) better than throwing adventure hooks until one sticks.
The ideal level is probably a page, with most of the emphasis on who your character is. I've fallen into the trap of writing mostly "what he's done" backgrounds, and they've never actually been helpful, to me as a player.
If you want to avoid background conflicts, I've got the Hamachi server running whenever I'm on the computer, and Hamachi has (basic) chat functionality. Or, I'm also on Skype frequently, so we could exchange contact information for that. There's also two guidelines that should prevent any trouble.
1: Don't put your background in previously established places without talking with me. Otherwise some details might have to be tweaked.
2: Your character has not come from, and has not been to, any kingdoms that have lasted for hundreds of years in peace and prosperity.
As long as you follow those two guidelines, the burden of avoiding background conflicts is on me. And I'll share a secret. The 2E Abyss had paid writers working to fill out information on it. Some of the 666 layers didn't even have a sentence describing them. It's not going to be hard fitting your character's background into my setting.
If there's still space i'll join. As I mentioned a few pages back I have alot of the books so i'll make a character and scan the sheet when i'm done.
As a note on backstory, does is matter which one of the different planes/worlds we come from?
Nice to see another interested player. If you're interested in coming from Malebranche or Thornvine Forest it'll work more smoothly if we talk about it. Same if you want to come from Cagazan because of the name. (Since I still haven't retyped what Cagazan actually is. Sorry.)
Otherwise, not so much. There's more blank spaces on the map than I'd be able to fill in.