Yes.. you can add friends immediately. And you're right, it is a shame that we can't separate one list from the other....
But, on the other hand, the guys over at the ladder have put together a list (look under WGT Usernames) that will list all of the participants on the ladders... you can get their WGT names and he has even made those names clickable to check over here if they are online or not.
Also... As Faterson mentioned elsewhere, you can always just park a browser in the "meet and greet" area, sub-section "players waiting for a match". It's a chat room that will send a tone when someone else comes in, in case you're off doing something else... then you can be off and golfing.
I hope this helps... and let's get together for a 9'er soon. =)