In the files below are some docs that may be useful to DMs (though players might also want to cast their eye over such docs as the Magic Item list).
(I will try to post to the forums when docs are updated).
Here is a list of what files exist.
Magic Item List
(Whilst DDI has all items, there is still now way that I know of to determine a random MI. So for now I have kept a list of all items have have. Note: The following lists do not include MIs from "Adventurer's Vault", b/c it already has lists by level in the back of the book. Roll a d10: 1-6 use this list; 7-10 roll from charts in back of "Adventurer's Vault").