I agree. The slates present a tone of voice that you don't hear too often from Mr. Olson's on-air announcing. And the way he jokes around during some of them (the hiccup before saying "Take 1", for example)...priceless.
It also looks like the Amazin' Slates are not just a weeknight thing. Even though That 70's Hour was pre-empted on Friday, it was there on Saturday night, and so were the slates. And it's scheduled tonight (Sunday night) as well.
So for those keeping track, that's 10 slates so far (Monday through Thursday, and Saturday).
Let's hope it continues.
[Edit: Make that 12. Sunday night's shows had slates 0135 and 136 (yep, no leading zero). From the looks of the schedule, the next time That 70's Hour will be pre-empted is Tuesday night for an immediate reair of the Anything to Win premiere.]