In the case of showflat being the highest hit page (215 000 - is that in one month? Quite the traffic

)...
-in theme settings, you could turn sown the default number of shown posts from where it is now. (variable amount of speed recovered)
-not show pictures with people's posts (a little speed recovered)
-turn off/remove ratings (a little speed recovered)
-if installed with php, turn on zlib as an experiment...it will reduce the size of the info being sent, but increase processor usage... it has the potential to make it much slower, or much faster, or balance out to do nothing (in which case it might be best with it off)
anyone else got any ideas?