Lewis Pulsipher just mentioned that he has a shorter, no-dice variant for Britannia. We emailed each other a while ago, after I commented on his blog, and he mentioned this. Apparently it cuts the length by a third, which would be a major bonus.

I hope it gets published, as I have no desire to play a full-length version of Britannia again. It should be cheap, so a no-brainer for Britannia fans.

Update
He has posted a session report of the variant at the Geek.