Seems a little nitpicky. Arrington was one of many investors in Seesmic a long time ago, when the idea was video comments. I actually think its pretty cool that he's not pulling any punches here.

And "seeing it coming" or not, the Twitter client seems like its working much better for Seesmic than the video comments idea ever did. I think they should just keep plugging away, doing things that Twitter won't do (such as running a ping.fm-like service).