Just stumbled across iusethis - well actually, I was pointed to it by someone who knows a little more about Mac desktop apps than me.

To think of the hours I slaved over my list of useful desktop apps, when I could've signed up on there and just clicked "i use this" 30-odd times. Of course, then you wouldn't get all my insightful comments in one easily-digested article.

Also, +1 to the site for supporting OpenID!