I often find requests for international membership (or membership for the PS3 and Wii) in the support queue. Though I've responded to them on a 1:1 basis, I'm not sure I've ever addressed them publicly.
Canada ROCKS. Amazing music comes out of Canada. Without boring everyone with a list of my favorite Canadian bands, I will simply point out that "YYZ" is the call sign for the Toronto airport, and I know this because one of the greatest bands ever pointed it out to me.
And left to my own devices, I would love to have Canadian users on Creators. (In fact, I would love for creators.rockband.com to be open to every nation in the world and for the RBN to every console type, including PS3, Wii, PS2, the original Xbox, and everything all the way back to the original Nintendo.)
However, there are incredible legal and technological complications involved. We rely on the Xbox because Microsoft's XNA program is the infrastructure that allows Creators to exist. This means that any arrangements we make need to not only work out with our lawyers (and MTV's, and Viacom's) but with all the various levels of Microsoft's lawyers in whatever fashion is necessary. Arranging for this to be possible (contracts, copyrights, etc., etc.) in the USA is difficult. Extending the legalities to address not only the laws of the USA, but the laws of another country -- well.
And it isn't because we hate Canada (or the UK, or Mexico, or Spain, or any of the other places that I've heard from.) But sit down and read... really read... http://creators.rockband.com/site/programTerms
. And then read http://creators.rockband.com/site/termsOfUse
. And then read http://creators.rockband.com/site/copyrightCompliance
. And then remember that these are only the user-facing side of the legalities....
I'm not saying we don't want to. We do, very much. But we can't make any promises, and we don't have any time frame.