This is a wonderful time. Safari and NetNewsWire, two pieces of software that I use all the time, are under active development. Hyatt is blogging his Safari progress in real time while Brent updates NNW progress regularly. Hyatt responds to trackbacks and Brent responds to emails. If you live in the world of Microsoft (or actually of pretty well any mainstream software development, let's not beat up on Redmond however popular that may be), this doesn't happen, won't happen, can't happen.
Brent's Ranchero is a small startup so we expect this kind of thing, but a serious tip of the hat to Apple for letting Hyatt hang it out in public. For what it's worth, this style of product development makes me much more likely to become a customer.