Found this on the IMDb board:
It was written around the same time more or less, and the creator admitted he wasn't aware of 28DL at the time of writing. If anything, they were BOTH inspired by Day of the Triffids written in 1951, which involves a man waking up in hospital to find everyone around him is blind and society has collapsed.
Kirkman has stated that he's banned himself from consuming any Zombie related media so as not to be influenced...and that he can't wait to read The Zombie Survival Guide if he ever concludes the series.
I thought the episode was ok. Interesting to see what they changed/added/subtracted from the comic. For those keeping score, the pilot covered one and a half issues.