App Store and iTunes Issues

I am not able to get into the App Store, or iTunes on my iMac or my iPad. My iPod is ok. I could not even access Apple Support Communities thru Safari I had to use Firefox. I did read that Apple was having some problems, but that it has been resolved. Apparently not for all users, as I am still having issues. Did I miss something to resolve the issues or do I need to wait for an update to something? Kindly help!