The limit is in place to reduce the size of the index. Currently it stands at a whopping 360Mb and increasing the limit would increase this size meaning slower search and a slower server, and would also mean it takes longer to post as it has to add the words to the index.
The best solution I can come up with is to use Google, as Google indexes all our pages regularly.
Use this link:
http://www.google.com/search?&q=CHANGEME+site:www.killermovies.com%20inurl:forums%20-inurl:archive
And change the CHANGEME to the words you are looking for. They can be as small as one character 🙂
Yeah, it's like in the RPG forum. There's a thread at the top saying "New game ideas wanted -- POST HERE FIRST" and there's still loads of ramdom threads in there. eg. Final Fantasy 7 - Dirge of Cerebus could be in there as someone's thought oh a forum about role playing games, and there are others who haven't read the RPG guidelines and posted their game anyway and then get pissed off when they get closed