Just found this:
xda-developers - View Single Post - Xperia X10 2.3 Roll-out Map - Rollout started
This is US Generic. If you want to use this one you can download it and install it with the Flashtool. No root required and it's exactly the same as Rogers' except you have more freedom with the APN if you decide to use another provider one day, and you'll have to manually install Rogers apps should you want them, they're available in the market.
You should know that for 2.3.3 SonyEricsson released one global baseband (.71) so you can install any version you want and you should not have any issues.
xda-developers - View Single Post - Xperia X10 2.3 Roll-out Map - Rollout started
This is US Generic. If you want to use this one you can download it and install it with the Flashtool. No root required and it's exactly the same as Rogers' except you have more freedom with the APN if you decide to use another provider one day, and you'll have to manually install Rogers apps should you want them, they're available in the market.
You should know that for 2.3.3 SonyEricsson released one global baseband (.71) so you can install any version you want and you should not have any issues.