I have a D100 and have barely had it a month. Already I have found dust on the mirror, screen, and CCD. Problem is, I don't have the AC adapter required to use the mirror lock-up. Instead, I used compressed air (VERY gently). It was enough to remove the dust.
One question, why do you need an AC adapter to use the Mirror Lock-up function? Is it just another ploy to make more money? <sarcasm>
There's a previous thread on this subject which you may not have spotted because it's on the Repair Shops forum.
On the subject of the AC adapter, it does seem overkill and I can't see that it really makes things any safer than if you could use the mirror lock up on battery power - there's always the danger of an interruption to the AC supply.
The mirror lock up will not work with the D1 on battery power. However, you can set the shutter to bulb and lock your MC-30 or hold the shutter release. This is the method recommended by Moose Peterson in his excellent book, "D1 Generation". Incidentally, he strongly recommends against compressed air.
I think it's safe to say that most of us do our own CCD cleaning. Nikon Tech (Melville, NY) usually has a 10 day turnaround time, so, naturally, if you have no backup camera to fill-in, that's going to produce a lot of down time and postal insurance is very expensive.
Reading Nikon's warnings and disclaimers about cleaning the CCD yourself will tend to make you a nervous wreck when you do it at first. The initial tendency is to be very, very gentle as you're SWEATING BULLETS. Gradually, you get confidence that you are not going to totally destroy your $X,000 camera and are actually removing all of the dust. If you do studio work with a PC tether as I do, you'll need the AC adapter anyway.
There are a ton of posts on this subject in this and other forums. I took my routine straight from Thom Hogan's "Wendy's" method using Eclipse and my own home-made swabs (www.bythom.com)