Having read a few of the books in the Jim Butcher series, I'm looking forward to this show. Paul Blackthorne is surprisingly close to what I pictured for Harry when I was reading the books (although it does state he has long hair--but hey, this guy's kinda hot so let's give him a break), and it sounds like they've done a reasonably good job adapting the stories. Jim Butcher has said he's happy with what they're doing, and that's a good sign.
This week's TV Guide says of the show, "A mildly entertaining concoction of humor and horror...this supernatural procedural is an agreeably escapist hour to help launch Sci Fi's Sunday schedule." Entertainment Weekly is less generous, saying, "...it's an uneven fantasy series that's not eerie enough to be a culty favorite (The X-Files) or goofy enough to be a guilty pleasure (Sabrina the Teenage Witch)."
If you haven't read any of these books, well, why not? Check them out at amazon.com, or scour your local library. If, like me, you like audiobooks, Buzzy Multimedia offers the first four in both CD and mp3 format. The books are narrated by James Marsters of Buffy the Vampire Slayer fame, and he does a good job with them. They're fun books, and I hope the show proves to be equally entertaining.
For more information on The Dresden Files, check out the official homepage at Scifi.com. Or drop by the official Jim Butcher website, where there's a forum dedicated to the show.