We've added FedEx shipping options to most destinations now. In fact, there are a few countries where we've found that USPS shipping is simply too unreliable, so we're only allowing FedEx to those destinations. If you only see FedEx shipping options to your address, this is probably why...
Looks like the Canada Post strike has been averted, at least for another year or two. So Canada shipments are now available with either USPS International or FedEx options. Both are very reliable to Canada, but FedEx is usually a lot faster (and more expensive).
Thanks!