My friend just did it last nite! He has the motorola pvr.
Went to bestbuy and bought a pvr expander. Plugged it in and called shaw to flip a switch and now it works. Has about 15 hours of hd in his pvr but it only shows 2% full.
http://www.bestbuy.ca/catalog/prodde...23&catid=21978
Doesn't look like it's released until the 10th on the website but he got one last nite.
I'm going to goto costco tonite and try just the regular Mybook from wd and see if it works. I think that is only around $150.