I've got quite a lot of material from
Baen publising, myself, but that's only good if you like the sort of SciFi they sell.
I think I'm pretty likely to continue to use the Connect store (even after my $50 'taste' is gone), as I find things there that I want to read. They do need to continue to work on the listings though -- almost 11k titles sounds great, but it doesn't translate to a very large number of titles per catagory.

Though they have added almost a thousand in the first month, so that's a good sign.
I know you can't get to it from Canada, but I'm hoping that once they get the U.S. release settled they'll look to other areas. They have said "no" about Europe, but I don't think they've said anything official about Canada.