Newbie

Right now, there is really only one for 2004:
http://rcm.amazon.com/e/cm?t=lightningcomcoll&o=1&p=8&l=as1&asins=0672325985&fc1=000000&IS2=1&lt1=_blank&lc1=0000ff&bc1=000000&bg1=ffffff&f=ifr

It’s the BizTalk 2004 Unleashed Book.

I think the Microsoft Virtual Labs on MSDN are a great place to start.