A few weeks late to this discussion, sorry!

:redface:
http://www.xdtalk.com/forums/general-sa-xd-xd-m-talk/104057-airsoft-xd.html
That - the resin mock-up by Tokyo Marui (a high-end Japanese airsoft make) - was sighted last year at the 2010 Shizuoka Hobby Show (note that in the in-linked thread above, there's an outlink to the 2009 All Japan Model Hobby Show: at that time, it seems that the XDm was only an "acknowledged proposal."
The Px4, which was a head of the XDm in the product-cycle, was just released to the mass market overseas some time in Q1 of 2011. You can see between these several dates how the various projects have progressed (i.e. the Px4, which went from a one-off that was finally "in the black" to full-production, and the seemingly stalled status - which really surprises me - of the M&P and the H&K).
Maybe another year?
The fact that Tokyo Marui picked up the idea is a very positive sign, but still, progress is slow, and uncertain, at-times too:
ajamesp51, where/from whom did you hear of the trademark issues? and is it just as it relates to the North-American market, or worldwide?