Well, I bought the MSI board. I'll detail my experiences with it...bear with me.
Now, I'm a pretty experienced system builder. My first homebuilt was a 486dx-66, before that I built 286-386 computers for a small computer store. My main system is built around a kt7-raid, all loaded and tweaked and I'm very happy with it. I have a few other systems, built from parts here and there.
i decided to the km133 solution, coupled with a cheap duron, would make a nice addition to my selection of computers hear at home. This wasn't going to be a primary gaming machine, wasn't going to be tasked to do anything strenous, I just wanted a box that I could play with different os's on, put together cheaply & easily and still have some decent performance.
I bought it from mwave.com about 3 months ago for $92. Slapped a duron 650 in it with an el-cheapo HSF (hey it was free) and a stick of 256mb generic pc-133. Tossed in a netgear 312fx & drives into an inwin, and booted. All looked good, came right up, went in to the bios & checked stuff out. Pretty standard, not an overclocker like my kt7, but I wasn't expecting much. No disapointment for me, but just an FYI.
My first attempt was to install windows 98. I was having a lan party, and wanted a box that my 18 year old nephew could game on during the day so he didn't have to hall his p3-450 up. Driver load was smooth, no hitches, used the included CD for video and audio. The vid looked ok, refresh rate not quite what my gf2/mx will do, but it was acceptable (1024x768x32bit, at 75hz).
Games like UT/Q3 seemed to run fine at 800x600x16, but were sluggish at higher levels. Audio wasn't bad, plugged into an old set of cheap speakers.
Did run into one problem, age of empires would crash after a few hours of play, and do it fairly consistenly. None of the other machines had that problem. Tried various attempts with drivers, direct x, swapped the memory (it's shared, up to 32megs of your system memory goes to video). Bummer.
Decided to try to make it a linux box after that lan party. Nope. Had all sorts of issues getting it loaded, mostly vid related. Maybe a better linux guru could have done it easily, I didn't spend that much time with it. Not a priority project anyway.
Decided then that it would make a decent server under win2k. After all, a file/NAT/DHCP/WINS server doesn't need much in the way of vid/audio drivers to work, I just needed to be able to put 2 NICS in it, and have it not crash on me. Went to load 2k server. Had an resolved an issue with the onboard audio that would halt the install process, once I figured it out (3 lost hours) it was finished. 2k server seemed to be happy on it, things running smoothly.
That was 2.5 months ago. It's been rebooted twice since then, once to add a HD to it for more file storage, once when I lost power for several hours. The stability and performance has been extremely surprising for a cheapo MB. It just works, and doesn't cause problems.
Hope that answers some questions. I still don't know why I had problems with AOE2. I'm not usually one to recommend boards with integrated video to anyone, but overall things were ok.