The fillable pdf of the original character sheet that I had posted previously was lost when the forums went down, so I would like to repost it. I have made a few minor updates/additions. Pretty much everything needed for character creation and long-term maintenance should be fillable, but a few in-session things will still need a pencil. If anyone would like something else fillable, though, feel free to modify and repost, or ask and I may be willing to do it.
Thanks to the Burning Wheel guys for a game that looks great and I hope to finally play very soon.