So I went through the support section and filled out the support form, selecting "multiplayer key request" in the "I have a problem with:" drop-down menu. I entered a description as required, but when I click on "Send", it goes back to the main support page, without any confirmation that my support form went through.

Is this normal? Am I supposed to be getting some sort of confirmation message? If so, how do I go about getting a CD key if the support form doesn't work?

Have you checked your email (including spam folder) to see if there's anything from GOG ?

I've checked both my inbox and spam folder, but no response yet.

I tried filling out the form with Chrome, Internet Explorer 9 and Firefox... neither of them showed any sort of confirmation message that the form was submitted, so I don't even know if they did get submitted or not. =/

GOG is closed on weekends so if there's nothing in your email yet then you might have to wait until next week.

I recently asked for GOG to send me CD keys for some games I'd recently bought, including NWN Diamond, and there was no confirmation after submitting the form, but I did get an email response from them after a couple of days.