Here are some fun links about the early medieval period:
This is a video trailer for a special the History Channel did on the Dark Ages:
Now. here is a game from the BBC, where you can take the part of a Viking and see if you are able to successfully conduct a raid as a Viking.
here was my final score of 494 points... I failed btw
Secondly, you can make your own Dark Ages character.
This is the link:
here is mine: