Red Hat... yes, Linux. It's the most respected Certification arround now. And most people don't know a whole lot about Linux... CEOs and other Corp people hear a lot of good things about it, and decide to switch over.... they need Red Hat Engineers to take care of them... and the number of RHCE (that the correct acro?) isn't that high....
If you want to learn more about it, the best thing to do is to pull out an old 486 out of the closet and install it, then play arround.... you'll find it's a lot like DOS (actually, it's a lot like UNIX... but that's another story.) You can download Red Hat for free from www.RedHat.com, or you can get some of the other flavors of Linux (Mandrake, SuSE, etc)
M$ = MS = The new Evil Empire (the old one was IBM). The basic complaints are, as formerly with IBM, that (a) their system designs are horrible botches, (b) we can't get source to fix them, and © they throw their weight around a lot.
The MCSE was once a respected (dare I say Highly respected) certification in the tech world. It says that you know just enough about MS products to install them and manage them in a networking enviroment... it also says you gave $1,000+ to the Evil Empire to help fund it's malicious practices....
Any company that hires an MCSE to support or manage a network might as well hang a sign on their front door that says, "Hackers Welcome... our Administrator password is 'default'." That is of course no offence to the MCSE, but rather a slam to the MS programers (or MicroDroid) who have yet to create a good Operating System.
Since there are people who insist on running NT/2000 network enviroments for busisness purposes, it is still a handy cert to have.... And it does look good on paper.... if nothing else....
Is this a good time to get into networking? Sure. Anytime is a good time.

It's even a better time when you have a dozen PCs, and room to have a bunch of friends over playing Quake, Counter Strike, Doom, C&C Dungeon Siege, or some other kick . game.