Nope, sorry. At least not now.
Not only does it put a huge load on the server, but the existing code doesn't allow me to set limits on what can be included in a slideshow. Nor does it allow me to limit "looping".
With it enabled, nothing would stop anyone from starting a slideshow at the top level album, and running through thousands of pictures endlessly - bringing the server to it's knees, and eating up our limited bandwidth quota in a hurry.
There might some hope for it coming back down the road. I'm just starting to work on some significant upgrades here, which will likely include a much newer version of the photo album software. I've not dug into things enough yet, but if the administrative limits mentioned above are available, I'll look into it.