We have put the finishing touches on the validators we announced in late January. There are now several ways to get to the validators depending on how you best remember them. The W3C validators are not all at one URL, so we’ve taken both approaches. You can access them from the subdomains the W3C uses (jigsaw, feedvalidator, etc) or you can use the validator.tamu.edu base domain with paths.
If there are any other helpful open source validators you would like to see inside the firewall please contact us and we will see about getting them online here. These validators are part of our commitment to helping the campus community produce the highest quality web work possible.