Nothing that hasn't already been said, but it's all backed up with stats and stuff.
Given all that, I suspect Houston GM Daryl Morey is thinking more down the road with this deal. Martin gives the Rockets an efficient scorer at shooting guard, something they’ve never had under Morey, with first McGrady and now Trevor Ariza being volume scorers. With Yao Ming back next year, Luis Scola can shift back to power forward and put Houston’s frontcourt rotation in order. I also suspect Morey and company think they can find another quality undersized four on the cheap–maybe not as good as Landry, but a decent replacement nonetheless.
There are still issues, like the fact that a backcourt of Martin and Aaron Brooks is problematic defensively and that the Rockets are continuing their tradition of star players who tend to spend a lot of time on the sidelines, but for next year I like the move for Houston.