I still have bluebirds around also...and yes, they DO love the birdbath. In fact, I don't think I've ever seen any other birds so throroughly enjoy their baths as the bluebirds do.
We had such a dry spell recently -- it hadn't rained since August and Katrina, until, oh, I guess around the first of November. And then one day a really strong shower popped up -- and out in the wisteria arbor that is right outside my dining room window the birds were weaving in and out of the leaves, getting their feathers wet and just enjoying themselves. Made me feel so guilty for not keeping the bird bath full. I take care of my granddaughter most days, though, and haven't done much of anything outside this year.