Ed Felten has put together a SonyBMG DRM Customer Survival Kit. It includes command-line instructions to determine if you have the Aries.sys driver installed on your computer, along with instructions on how to disable the service.
Professor Felten also notes that Sony will actually tell you how to work around its copy protection if you ask:
How to get songs from these discs into iTunes, an iPod, or anywhere else you can legally put them: SonyBMG will send instructions on how to do this to anyone who asks. Note that their instructions direct you to agree to their End User License Agreement; be sure to read the agreement and think about whether you want to accept it.
Or you could just read the instructions at his site.
Unfortunately, the workaround involves making inferior (128K) WMA copies of the tracks, burning them to a CD, then reripping them in any format you like. There’s no way to get a decent copy, much less a perfect digital copy.
Ed Bott 
The really unfortunate part about Sony’s instructions on getting the music into your computer is it requires the installation of the “player” software which installs the DRM rootkit virus. If you haven’t already istalled the “player” malware, you might investigate the various legal ripping programs which can see the audio tracks on the cd and convert them to a format appropriate for your computer use. If you have disabled the Windows Autorun feature (as you should – google: “disable windows autorun”) the DRM malware will not load and thus cannot prevent you from transfer of the audio tracks to your PC.
You could work around the software with Sony’s instructions, but apparently they are, well, bad.
If you’re a mac user you’re not immune. http://www.macintouch.com/#tip.2005.11.10.sony Apparently the SunComm software is available on other discs, and works under Windows.
That ever-reliable (heh) source of something, BoingBoing has much more on this topic.
So, who’s rushing out to buy CD’s now? 🙂