Sunday night on the Talkcast, we approached the rumors of a 10.5.7 release coming soon, and all pretty much agreed that yes -- whatever is in it, it's very likely coming soon. Here's another rumble of thunder that hints at the storm: Nvidia announced a brand new card recently for Macs, called the Quadro FX 4800 -- it offers "ultra fast performance," "realistic effect," and tons of triangles and all of the other things that comes along with a video card that looks more like a Flip Mini than an actual set of circuits.
But most importantly, under "Drivers and Downloads," you can see that the Mac drivers require Leopard 10.5.7. Combine that with all of the other speculation flying around, and odds are that we'll see a new version of the OS in Software Update as soon as later today.
Thanks, Daniel N!