Second paragraph, two hyphenated phrases? I would rewrite it:
IBM, Sun, Oracle, Hewlett Packard, Linux, AOL/Times Warner - each a company to be reckoned with - all working in the same direction, take on the characteristics of a lava flow. And they have friends, lots of friends (OK, maybe not AOL, but the rest of them do).
Starting with the preposition is technically a gramar violation, but I think it's acceptable for stylistic impact.
General gripe: There has to be a better way of starting a sentence with '.NET' than anyone has found yet. (This isn't just directed at your article, though it has an example of it.) Starting a product name with a period is just wrong.
Under "How will .NET Work":
... so they built a new language. C#
I think that period is supposed to be a colon.
Under "Microsoft Instant Messaging," last sentence: "getting an injunctions" should obviously be "getting an injunction."
Under "Collaborating and Cooperating": "Times/Warner" should be "Time/Warner".
And the last paragraph of that section, two hyphenated phrases again. I'd make the first hyphen a comma and drop the comma before "Microsoft Rules." It's following an essential clause.
Under "Can They Do It?": "No other program will work now, Users trying ..." Comma for period.
"Every time they are hauled into court they will be presumed guilty (and probably are)." I agree with the editorializing, but that seems a little strong, considering there will likely soon be a whole sub-class of attorneys who specialize in filing Microsoft anti-trust suits. Wait, that sub-class already exists: ambulance chasers.
"We don't have to care, were Microsoft!" Need an apostrophe in the possessive.
That's all from this spelling/grammar/editorial Nazi. BTW I like this article as much as I always like your stuff. But you did pretty much beg for us to break out the red pens. ;)