Even on LS11 all IBMlers claimed that there will be no support for WP7 (only WM) a lot of users would benefit from it if Traveler would support WP7.
The slogan at Lotusphere 2011 was: Be social. Do business.
In my view it is not very social to ignore minorities (IBM likes to see MS as minority in the mobile world).
Since Nokia and Microsoft announced their partnership (Nokia goes away from Symban an goes to WP7) the chance that IBM continues to see WP7 as not important decreases.
Hope we will see Traveler supporting Windows Phone 7 asap.