So you've started doing ACTUAL crawling now. Not just the commando type dragging crawling that you had been doing. Now you're on your knees and getting around more efficiently. I have to say you seem to really favor this new way of transportation as well. I don't blame you.
You're also quite capable of pulling yourself up on the couch etc now. Way to go, baby! Pretty soon we'll be cruising and walking! I know it's going to be more strenuous on me, but hey, what milestones, eh?