If you're referring to the ones pre-upgrade, I usually can't find them during a search here, but if I go to Google and do an old site search for forums.klov.com or forums.webmagic.com, I can usually find a cached page of an old thread. i then replace the 'klov' or 'webmagic' with 'arcade-museum' and I can find the thread here.
It doesn't always work, as some threads were lost in the switch...