i think the one i used to use was either NiftyTelnet, or MacTelnet, but a search on versiontracker reveals <a href="http://www.versiontracker.com/mp/new_search.m?productDB=mac&mode=Quick&OS_F ilter=MacOS&search=telnet" target="_blank">quite a few more</a>...
no chance of using OS X? it's much easier, because you can just install mysql, use Terminal and do everything locally