So can I use AS 2.0 for Online Multiplayer?

Just a quick question, because I cant seem to find out how to use Action script 2.0 for the Multiplayer API

We do not have any easy way for you to use AS2 for your game. It's technically possible using embedded swf files and localconnect. But this is outside the scope of most people.

The simple answer is, there is no as2 support.