Stevie Screensaver
 

anyone know of a site that offers screensavers for MAC?

Yes. Nothing I've seen specifically with Stevie as a screen saver but plenty of freeware screensavers that do slide show savers...with the default and easily used being iPhoto.

Anyway:
Apple Downloads: ScreenSavers
VersionTracker: OSX: Screensavers
MacScreenSavers.com

And for hi-res backgrounds/wallpaper, icons, Mac GUI goodies:
my fav site:
InterfaceLIFT

Did you try Stevie's site? There's a screen saver to download there:

http://www.nicksfix.com/screensaver.htm