Couple of minor tweaks to the forum -- we've set up the APC caching library which should make the forum load faster.
We've added a line to the bottom of each forum page which will show how long the page took to render and the current server "load" (load of 1.0 means cpu is fully loaded; any value under 8 or so is good). So if a page is slow to load for you, check this line at the bottom of the page -- if its showing fast render time and low server load, then it's probably a network connectivity problem.
I also tried to put back the selective quoting feature on the forum where you can select some text and then hit the quote button to quote only that text; still seems a bit flakey but hopefully that's just old js in the cache which will work itself out.