DiskStudio 1.1.1 released
There are about a dozen apps to do this on a PC, but not so many for the Mac. In fact, this one area has always been a problem for me: repartioning a drive without erasing. There are technical reasons why this isn't necessarily the best idea in the world, and OS X really doesn't need partitioning (normally) in the same way Windows does, but it's nice to be able to do it. Micromat's DiskStudio is a Tiger-compatible tool for changing the size of partitions without have to completely reformat your drive. Is $49.97 too much to ask for this? That's pretty much on par with the Windows apps that do the same, so if you need it, this is probably the horse to bet on.