Dan Benjamin walks through how to install Ruby, RubyGems, and Rails on Snow Leopard. Also be sure to check out his other Snow Leopard guides for Mercurial, Git, and MySQL.
MacWorld rounds up Snow Leopard’s new features. “Smart Eject” sounds like it’s going to be super useful:
When you first attempt to eject a disk, the eject manager actually sends out a signal to its own subsystems and other programs, asking them to relinquish their hold on the volume if that’s possible. If that fails because a program really is using the drive, Snow Leopard will bring up a window telling you which program doesn’t want to let you eject the disk. You can then switch to that program, quit out of it, and eject the disk.
One of the biggest changes is that Snow Leopard now counts data sizes in base 10. In this example a 320GB hard drive shows as 320GB as opposed to 297GB
This is going to be weird–if you take a file from another OS and put it in Snow Leopard, its size will increase (even though it still takes up the same physical space). Not sure how I feel about this.