I believe that Telus will get the Curve once RIM develops/produces a world version of the 8300 similar to that of the 8800 series. Just like the 8830 which is on Sprint and Verizon, the 8330, if they follow the same numbering convention, will drop on those two networks also.
Once that happens, it's bound to get into the hands of CDMA Canadian carriers like Telus - It's just a matter of time IMHO.