We are trying to work that out right now. For the time being, you can activate the character sheet in your profile and fill in the spaces there.
I think for now it will have to be copy and paste a sheet from a character creator, (I will be posting links to them soon.), or enter one manually as a new message with the subject line as your characters name. I will be splitting the forum into two sections. One for 3rd edition, and one for 4th ed.
I will continue to look into other ways to post the character sheets that may be better.