Lily has this crawling thing down now. She uses her knees and can cross a floor in a hurry. She LOVES cords, computer cables, light plugs, cable cords, etc. She makes a bee-line for these things, grabs ahold, and whacks it up and down. Looks like we're going to have to baby proof a bit before we move. Ah well.
She's also learned to growl. It's hysterical; she plows along the floor (always taking the past of most resistance) and growls at everything. Mark carries her around and she growls at everything she passes. Cracks me up.