Yeah walljumping was fun, used it alot untill 2.4 patched it.
And yes speedhacking is possible too, if u go to fast or move from cord to cord too fast u get auto banz.
But im shure there are alot of other hacks/exploits.
However my faf one is really: MMoglider. Leveling yourself ''legit'' to 70 within a month, then if want u could sell that char for ~200$ depending on his gear.
BTW i might buy a PENTIUM 4, for 200 euro's and run a server on that one
Those still pwn since u need 1 proccesor. 2 might be handy but pentium 4 still rox on systems that only use emulation or w/e