For example, you may want to take a look at this pagewith some new stuff (although hosted at the old address). Besides Bifrost material you will also find links to other interesting stuff. Check it out!
Or, you could take a look at the former pages archived here. These where grabbed from the old (some times _realy_ old) bifrost site. Most of them are also available in both Swedish and English. Please note that links to other resources can be broken by now.
As mentioned, this site should improve sometime in the future, so stay tuned (but don't hold your breath;-)