Yes. I have the same syptom as yours.I have to hit keyboard several times, and eventually it wakes up...... I turn it off most of the time..
I tried several way to fix the internet problem including yours, so far no success. I just start to do hackingtosh and haven't started to mess with DTST (a lot home work to me).
real quick cause I gotta drive to a job: forget SleepWatcher - the NIC gets deactivated on BIOS level, and not (always) correctly reactivated on wake-up. This needs to be tackled in the DSDT. I ran all compilable patches in DSDT patcher, that didn't solve this. Google for something like "DSDT BCM5722D.kext sleep" or "DSDT wake up lan after sleep" or "DSDT wake up nic after sleep". I am totally sure this has been solved yet, just a matter of looking.
grfx card: oops, I must not have followed your link (256MB version) directly 'cause I ordered the 1GB version .. just $10 more after mail-in rebate .. works good res. + QE/CI - just tested on VGA so far. The only odd thing is that I need to press a keyboard key TWICE for OS X to wake up, the second key about 5 seconds after hitting the first key - otherwise it goes back to sleep, hmmm. Doesn't matter if the ATI5000injector kext is in E/E or S/L/E. Adding Eulemur as ATIConfig string doesn't help, either. That oddness did not change in 10.7.3 (and neither did the NIC-in-BIOS reactivate as expected).
Does your 256MB version wake up right away from sleep with *one* keyboard stroke?