My radiator went bad right after I bought my 94 Integra as my daily driver. If you're interested in DIY, check this site out:
http://www.team-integra.net/sections...owArticle.asp?
I don't visit the HAN forums as much as I once did, but that link was one of the best step-by-step How-to's I've used.
Don't waste any time. Replace the thermostat and radiator as soon as you can. The job's easier than you think.