This number does not however include the size of the sleepimage that will be created by the installer. This sleepimage is related directly to the amount of RAM that your machine has.
sudo pmset -a hibernatemode 0
Correct me if I'm wrong, but isn't Lion smaller than Snow Leopard (which was smaller than Leopard) anyway? Why bother?
"So what files can we delete to thin down Lion?"
I ran Monolingual on the Lion GM installation to delete ALL languages EXCEPT English, and it reported no less that 1gb "removed".
I then used Drive Genius to defrag my Lion boot partition.
Cleaned it up pretty well!
this is how my hard drive space looks
Looks like MonoLingual 1.4.5 cleaned up my problems with the GM of Lion; appears to be working and recovering space the way it used to under SL!