Found 2 compatible products:

Media Studio for Blackberry^®

Put your DVDs and videos on your Blackberry and watch them in great quality, with stereo sound and in full screen landscape mode. A memorycard as small as 128 Mb is enough to store a full length feature film, or videos and home movies up to a hundred minutes.

Business and holiday travel will be so much more relaxed and kids love to watch movies and tv in the car. With only two clicks, this PC software converts the content of your video or DVD to a super small movie file, which will play on any video enabled Blackberry, such as the Pearl (8100) and 8800, from a postage stamp size memory card.

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Mobile TV Center

Watch TV on the Blackberry and 500 other devices, such as most cellphones, Pocket PCs, iPod, PSP and portable media players. Take your TV programs on-the-go. All the shows that your record with your Windows Media Center are automatically converted in the background and transferred to your mobile device.

Simply record TV-shows for your portable device by selecting a show in the on-screen program guide. So whatever you would've watched on the sofa, you can watch elsewhere instead !