Wow. First let me say thanks to you all for the great info. I'm a new susbcriber to Anandtech.com, and I'm a bit blown away by the helpful advice & knowledge level available here. (And no, I'm not being a kiss-butt -- I sincerely mean it.)
On to the topic at hand ... I suppose I should begin with an apology for not putting the model number of the mobo in my original post. The board I'm considering is the K7VTA3. Probably would have helped to have put that in there, huh? Sorry.
I fully intend to use a decent power supply, but thanks to you all anyway for driving that point home as a reminder. I agree with you all about the importance of a good PSU (particularly in the area of STABLE output vs. peak ouput 'capability' specs that can be misleading). I didn't know about the Sparkle -- thanks, Buz2B. I'll take a look at it.
And I'm figuring on using some brand-name RAM like Kingston Value RAM, Crucial or Mushkin. I'll probably watch the ads & pick up whichever one of those that's on sale in the next week or two. On that subject: So I don't have to look it up, do any of you know what level of RAM the K7VTA3 uses optimally?
Too many interesting and good comments from you all to address individually here, so I'll just summarily say thanks again.

I read them all and found every one helpful. I may also look at the Albatron, Biostar & Elitegroup boards some of you mention. The thing with this project is that I'm particularly busy with other things these days and don't really have time to research every component, price, and consideration like I would for my "main" computer that I use for the really important stuff. This is just an extra PC for undemanding applications and experimenting on, so I just wanna put someting together quickly that's no frills & reasonably cheap. I want reliability more than speed or fancy features. I just saw the Fry's ad for the K7VTA3 and was surprised to find ANY mobo & Athlon 2200+ combo for $59.99, hence my original posting.
Oh, one other thing: The ad describes it as a "Bare CPU with QuantiSpeed Architecture." I know what the QuantiSpeed is, but what does "Bare CPU" mean? Does that mean no heat sink/fan for the Athlon?
Ken
PS: One more "one other thing." Do any of you know about the quality of the onboard audio on the K7VTA3? I would like to have passably decent audio to listen to online radio stations at times (no MP3 or CD playing planned with this computer though).