That would be excellent
A good (and thorough) validator would be welcome, for sure, as long as I can disable components I don't need; I let mine use HTML tidy, but much of what it reports could be considered "noise." It's easy to pick and choose when there's only a handful of "problems" reported, but if you include too many different validators then that noise can add up quickly (I've never seen a validator that didn't include at least some
erroneous or superfluous reports, and it can be difficult to disable certain checks without disabling some of the useful checks as well).
For now, maybe someone knows of one that allows you to add custom searches? Maybe with a customizable INI file or something? The company wouldn't be adverse to paying for something, though I wouldn't want to use a big bulky suite that's primarily meant to do things that I don't need.
When I'm at work tomorrow I'll try to remember to post what validator I use, in case it can help someone else. It's a Firefox extension that does the validation locally (most of them send the code to online validator(s), which I'm not comfortable with for obvious reasons) and it does a great job for what it does; it just doesn't seem to do well with empty tags.
If someone does decide to make a custom validator, I would love to throw in a few ideas
I would also be happy to pick the brains of some of the developers around the office, too (there are lots, including those with varying specialties, but there's a few very good/experienced people that come to mind).