At the moment I'm not worried about when Season 9 (I assume you're referring to this season of the mothership, as it was the first one with Angie Harmon) will be released on Region 1, as there has been a long wait between seasons. Check the last news article but one posted on TVShowsOnDVD, as it gives an indicator of what MAY be released by Universal next on Region 1, both the ninth season (Angie Harmon joined the main cast in this season, the separate movie Exiled aired during this season, and the third and last crossover with Homicide: Life on the Street aired towards the end of this season) and tenth season (Jesse L Martin started his long run on the series and there was a crossover with new series Special Victims Unit).
The seventh season of Law & Order was released on Region 2 in the UK in April last year. No sign yet of the eighth season, so I'm considering getting the Region 1 version. I'm more worried about whether there will be more DVD season sets of the mothership on Region 2, than Region 1 season sets.
The eighth season Region 1 set was released in December 2010, so I'm guessing that the ninth season (and maybe the tenth season as well) will be released at the end of this year. But that's just a guess.
Criminal Intent's sixth season was released on Region 1 three weeks ago, so I don't think we'll be seeing the seventh season until next year (unless they speed up the releases).