March 29, 2011 is the big date for you using unlocked Telus WP7 handsets and Telus WP7 customers.
Browsing through the Telus phone pages this morning yield this information
"The earliest date that a TELUS customer can receive the Windows Phone 7 software update is Tuesday March 29th, 2011. Microsoft is releasing the software update in a phased approach and it may take up to four weeks for all TELUS customers to have the option to receive the update and upgrade their device software.
Keep your smartphone running efficiently by using the latest available software.
The release of OS software 7.0.7389.0, provides the following benefits and enhancements for your smartphone."
Still combing through the Intertubes to find information for you Rogers, and Bells customers.
Source: Telus HTC Surround