It will probably work on verizon fascinate too since hardware is exactly the same. But it's risky to try.
The VZW fascinate and Telus fascinate are completely different in terms of hardware and software. One of the biggest differences is that VZW fascinate has a CDMA radio and the Telus fascinate has a GSM radio.
If it is just a I9000 rom with the hardware keys changed to work with the Telus Fascinate, then it won't work for the VZW fascinate (without a lot of hacking) because of the differences in hardware and software.
Errrr....
Isn't the Telus Fascinate HSPA while the Verizon version is CDMA? And while they share a name, the model number for the Telus Fascinate is T959D, making it a t-Mobile Vibrant variant....
This.