I'm also a fan of Tamilee Webb's stretching videos. If you get it on DVD, it actually combines two separate videos previously release on VHS. It's a great bargain and provides some good variety.
Of course, you can also do yoga; in fact a lot of "stretches" you see on these videos are actually yoga poses, or modified yoga poses. You might look at
www.gaiam.com, they have a lot of good videos for all levels for yoga and Pilates.