1 word
Limewire.
Have dwnld all the "new" episodes. Have watched End o Time pt 1+2 & 11th Hr. on the PC only. Once I get moved to the new side of the duplex I'm remodeling will be hooking up my HD out to the 7.1 surround sound/ AV receiver which is hooked to my 42" panny 1080p plasma. It's gonna be a Dr Who marathon before to long. Planet of the Dead, The Waters of Mars, 11th hr., The Beast Below, & The End of Time pts 1 & 2. in order of release.
BTW Limewire is now tied in with AVG anti-virus so it's unlikely that there will be viruses embedded. I don't use it but have scanned all the epi's w/ my A-V and none have viruses. So feel pretty safe using these and they are in HD.