In case you're wondering if I've dropped out of the iPhone world, I didn't. I do a lot of work in the mobile world, so I have a lot of different devices, including a BlackBerry Pearl 8100. The built-in ring tones aren't exactly the type of thing you'd want to listen to more than once, so having a BlackBerry ringtone editor that runs on a Mac is a good thing.
I have just one gripe about RIngtone Studio; it's a single-function application, and the price tag -- US$29.95 -- is really quite high for something that just creates ringtones. PocketMac defends the price by noting that many BlackBerry users get into subscription ringtone plans that can cost as much as US$9.99 every month.