I updated using this link and downloaded it to my computer, extracted the update.zip, put in on my sd and installed with power button and volume down. took less than 5 minutes to install.
link
http://vache-android.com/files/Acer_A500_7.006.01_COM_GEN2.zip
I am in Washington as well and have several friends who bought the same tablet around the time I did. No one has yet seen the OTA update. I used the link posted, thank frnkws, and it works as advertised, haven't seen any problems at all. Seeing the "external sd_card" from the PC is nice, but for reasons I have not yet quite figured out, only folders created from the PC seem to be viewable on both. Permissions look the same, so not quite sure where the issue lies. Being able to connect NTFS drives via USB is very nice. Obviously, I was too impatient to wait ....