I had the chance to test AnySee’s USB based DVB-C tuner with MythTV, and I can confirm it “just works”.
To setup the AnySee E30 C Plus just follow my Terratec Cinergy C PCI HD + MythTV guide, the setup is exactly the same. The only thing I noticed is that the signal strength is not as high as it is with the Terratec card, it hovers around 40-50% vs 90-95%.
Dmesg output:
usb 2-6: USB disconnect, address 4 dvb-usb: Anysee DVB USB2.0 successfully deinitialized and disconnected. usb 2-6: new high speed USB device using ehci_hcd and address 5 usb 2-6: device not accepting address 5, error -71 usb 2-6: new high speed USB device using ehci_hcd and address 6 usb 2-6: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64 usb 2-6: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64 usb 2-6: config 1 interface 0 altsetting 1 bulk endpoint 0x1 has invalid maxpacket 64 usb 2-6: config 1 interface 0 altsetting 1 bulk endpoint 0x81 has invalid maxpacket 64 usb 2-6: configuration #1 chosen from 1 choice dvb-usb: found a 'Anysee DVB USB2.0' in warm state. dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. DVB: registering new adapter (Anysee DVB USB2.0) anysee: firmware version:0.1.2 hardware id:15 DVB: registering adapter 0 frontend 0 (Philips TDA10023 DVB-C)... input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1d.7/usb2/2-6/input/input10 dvb-usb: schedule remote query interval to 200 msecs. dvb-usb: Anysee DVB USB2.0 successfully initialized and connected.