It's not a simple plug-and-play but the driver over at
http://www.isely.net/pvrusb2/pvrusb2.html works very nicely in mythtv.
!!Do not confuse this device with the WINTV USB2!!
This is an excellent option for low-power machines and laptops with video out as all of the decoding is done on the usb2 device. Remote works perfectly. The cpu overhead is practically non-existent. Sets up in mythtv easily. Stereo audio works great.
Device does not support subtitles. Nor do any of hauppauge's usb tv tuning devices.
Pay careful attention to the following requirements:
You *must* have a kernel built from sources on the box. The driver builds against compiled/installed kernel sources
You should have a usb2 port. It works much better on usb2. Expansion cards are cheap enough.
You *must* follow his instructions carefully with one exception. He claims his perl script for pulling the firmware out works easily. Well, it doesn't. You need to point the script at the right file on the win32 driver disk you got with the device. The name of which escapes me. Just contact me off list. m_nospam_ AT Ya_stillnospam_ hoo.com and I'll send them along.
As of (3/07) they are supposed to be able to freely distribute the firmwares with the driver, but I haven't seen anything yet.