They had the movies which together come out to about another season. I don't want to spoil anything if you haven't seen the 4th one but they leave it open for the series to come back and I know there's still a fanbase that would still go crazy if they announced another season.
I agree with you about The Desden Files, considering i'm a fan of the books, as well as what Charlene Harris puts out. I'm not a big TV watcher much anymore...i'm old school i guess. My favorite series was "Wild Wild West"...a classic in my book. If they could reinvent it (and not in a Will Smith kind of way!), i'd be willing to give it a try. There's so little out there, what with cop and hospital shows, that i'm just not excited to turn on the TV.
I liked The Dresden Files when it aired but going back and watching it after reading the books it was terrible (Though the casting was PERFECT, I always imagined Morgan in the books as the creepy black guy and it made the first book immensely more enjoyable).
The Dresden Files TV series had some bits that pissed me off so much (The hockey stick, his MASSIVE loft, Bob, Murphy, etc) but I still was able to enjoy it as an off-shoot of the REAL and much better books.