The new Apple MacBook and MacBook Pro are just crying out to be used with the equally new 24-inch Cinema Display, but what if you're perfectly happy (and who wouldn't be?) with your existing 30-inch Cinema Display? Apple has switched to Mini DisplayPort on their latest computing hardware, but the older LCD uses a DVI port. No problem, Apple has your back... as long as you give them $99 for the adapter cable.
Your $99 gets you a chunky box seemingly powered by a separate USB connection, which lets you run your 30-inch Cinema Display at up to 2560 x 1600 resolution. You'll also have to make do with, at most, the MacBook Pro's 15-inch screen for a while; the adapter doesn't ship for another 4-5 weeks.
Now you could argue that, in the grand scheme of Apple hardware, 99 bucks isn't a huge amount - certainly not compared to the $1,299 minimum for one of their new notebooks. However you could also argue that, after spending all that money, it would be nice to get a cable in the box or, at least, have it subsidized a little so all those loyal Apple customers don't get screwed when the ports change. I've no doubt there are people from both schools of thought reading this, so let me know in the comments which side of the fence you sit on.