I've just finished for the summer today, so soon I'll be organising the third season of The 5 Hour Collab in the Collabortion forum. If you're not familiar with these collabs, here are the previous installments:

The 5 Hour Collab
The 5 Hour Collab II
The 5 Hour Collab III
The 5 Hour Collab IV
The 5 Hour Collab V

The last three 5 Hour Collabs got a decent amount of views so I'm going to start putting Newgrounds Ads on all the upcoming installments so collab participants will get a chance to earn money off them. I'm not sure exactly when the next Collab is going to happen but if you want me to PM you a week before it starts, tell me in the comments and I'll send out a PM to you then.