Well, not right now, but after Martin returns. He'll be 28 on Dec. 12th, so assuming it's 2-3 years before we're ready to make a serious run, he may be just a bit too old to figure into those plans.
He had career highs in mins., shooting %, 3pt. %, rebounds, assists and points last year, and is even better in most of those categories this year.
With a 4-6 week run as a starter, I think his value will be as high as it can get. He's got a reasonable salary at 4.75 for 4 more years.
Maybe he's not the center piece of a trade, but if he makes the difference, I'd say do it.
Like this trade for example:
Artest, Salmons and KT(3 yrs. at just under 8 mil) to the Knicks for Lee, Marbury(2yrs. at 19 mil) and the Knicks 2008 #1.
Figure the #1 can replace Salmons, and you get a 24 year old David Lee for a 28 year old Artest who may opt out after this season, and free up salary one year earlier.