In addition to this I would like threads from all sections to show up on the front page. If they are important enough to host on the site then they are important enough for the front page. For example this thread doesn't show up on the front page when someone posts to it. I think it should.
If I'm looking for a specific thread that I can recall from some time ago, but I can't remember what section it was in, I can forget about finding it; that's why I'd like to be able to search the whole site at once.
Extra optional google site search would be good, I have to agree with server resources, with a ton of people searching it does use up a great deal of resources on a server (pending how good the server is). Use googles server resources .