The Flock browser seems interesting but I get the impression that it’s pretty much failing.
There are important problems with using it with WordPress.com and Blogger that haven’t been fixed.
The traffic on the Flock forums does not seem commensurate with a very popular application.
I certainly wouldn’t be expecting a rapid update of Flock from being based on an earlier version of Firefox to Firefox 3 when it goes gold. That would really hurt because the page zoom function in Firefox 3 will be so so nice on the many pages that have small letters and blank space on both sides.
So should one spend time using Flock or would it make more sense to keep fiddling with Firefox extensions and otherwise finetuning Firefox?