Mac|Life reports via "a source" that OS X 10.5.7 will be seeded to everyone's Software Update on friday. With the development of OS X 10.5.7 seemingly winding down we're hoping that Snow Leopard 10.6.* in all its Grand-Central-multi-core-optimization-OpenGL-tons-of-RAM-make-everything-fly goodness is right around the corner (perhaps at WWDC in June).
If you've been champing at the bit for the magic of 10.5.7, according to a super-secret Apple source, your champing can cease on Friday. The newest version of Leopard is slated to fix a slew of networking, syncing and bluetooth issues.