I was hitting the check now button for weeks. Then...
I read this on another forum, and it worked.
Home/menu/settings/apps/all/google services framework/
Once it opens clear data and force stop it.
Hit home/settings/about phone/check for updates.
Yes sir. Went into settings and clicked "google services framework". Then i clicked "clear data" and "Force close" after it was completed. Then I went to the "System Update" button. Any other ideas??
Im in Idaho, It worked for me, but i had to do it twice as well. Force stop first, then clear data, then checked for update. Nothing the first time, but did it again and Bam! there it was FINALLY!!!