Macbook Pro + iPad WiFi won't stay connected - any idea why?

Since updating my 2010 Macbook Pro, its WiFi connection at work cuts out, and usually stays off unless I reconnect.

I've tried a number of solutions, including having Network Utility "ping" Google an unlimited amount of times, renewing dhcp lease, etc. So far, nothing's working.

I decided to post here after updating my iPad to ios 6, and I'm having similar problems with my Wifi - it simply wont' work after updating the software. Really, this is kind of unacceptable as WiFi is essential to actually using either one of my devices.

Anyone else out there find solutions to this?