Clint, the 722 doesn't merely add more storage space than the 622. The 722 is also black. The 622 is old school silver.
![Stick Out Tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Seriously, the 722 also adds more VOD programming than the 622 due to the increased storage space.
It's definitely a slip saying 55 minutes. The 622 does 30 hours of full bitrate (19 Mbps) 1080i MPEG2 HD. Obviously, recompressed MPEG4 takes up a lot less space allowing for more hours. The 722 is 55 hours. The upcoming 922 is the one to make you say, "Wow!", with its built in Sling box capability. It's interesting that you review the 722 the week the 722k comes out.
Thanks for the review, Clint!