Hello
Now i have had the same problem SO many times an its very frustrating. When i try to queue for an event nothing happens when i press the wait list button, or whatever its called. Nothing happens.
Hope you can help or that you are aware of the problem. Thanks in advance 
elert 

Same thing happens to me... but it started today, like few hours ago... it was working earlier today.
When I click on "wait list" it doesn't go to "pending" instead nothing happens... but I noticed that if i wait some time (like 2 minutes), sometimes it turns to "pending" (sometimes nothing happens at all) like if there was a delay. Might it have to do with Blizzard problems with connections they are having right now in Europe? Thanks!
 

clicking wait list will send a msg to the group leader asking to join their wait list.  if the group leader logged out, there will be no response.  if battle net is having issues, response can be choppy.  it is not uncommon for messages to simply disappear in b.net... and there isn't a thing I can do about it. those are blizz problems