Let me chime in here in because my experience is oposite of what Carleton said....my first fixed gear (read: assembled bike) was my 722TS and I had a blast researching the hell out of names, acronyms, ISOs, manufacturers, forums, blogs...till I was 68% confortable to buy the parts on my own.

Granted that it was a frightening experience but I came out VERY knowledgeable (not experienced) about what parts, standards, acronyms are. Would I re-do everything again? Hell yes, it was the process that was fun, don't get me wrong, the bike is sweet and I do ride it everyday, but the process of research, getting to know this world was the most fun. Did I get everything correct? No, I would say that I get 85% correct and to me it was worth it.

I'm not advocating that everybody should do this, everybody is different, have different priorities, likes no hassle things or not...but to say that it shouldn't be done, well...that's just wrong. If you like to research, learn new things, then go ahead...be advised that it will be a twisted path but it's a fun path.