[link|http://www.dcd.uscourts.gov/98-1232ci.pdf|PDF]. It's 36 pages.
I haven't read it carefully, but notice that she does often say in footnotes that "Microsoft's memorandum ... is misleading...".
At first blush, she seems to be considering things carefully.
Note that it's just a preliminary opinion and not an Order (last paragraph). IANAL, but it seems that it's just a formality to indicate that the Tunney Act does apply, so that she can rule on the case eventually.
Cheers,
Scott.