I just upgraded to Version 4.0.2 and enabled the experimental feature "Handle connection attempts in Network Monitor" option. As a long time user of Little snitch, I thought this would be interesting to try. However, I quickly learned that having the network monitor pop up frequently becomes a burden, and is tiring and frustrating. That said, I do like the new section of "Unapproved Rules" that highlights rules approved via the Connection Alert.
Thanks for a great product.