Also to clarify, this is not a TIPH change. The "line up and wait" change is expected at some point but no date has been set.
The phraseology for taxiing aircraft to a runway for takeoff is changing. Starting today the phraseology will be "Runway XX, taxi via A, B C... etc." So, Runway 24L, taxi via Juliet, Alpha" would be the phraseology. Assuming you do not cross a runway to get there, you will taxi via the assigned route. If you do need to cross a runway, you will hear, "Runway XX, taxi via A, B, C. hold short of Runway YY." Or, of the runway is either inactive/closed, you could also hear, "Runway XX, taxi via, A, B, C, cross Runway YY."
Also, no aircraft, vehicle, etc. will be given permission to cross multiple runways in one clearance. If an aircraft, etc. has to cross multiple runways, you will get clearance to cross the first one and will not receive clearance to cross the next one until you are completely across the first runway.
Basically for all of the pilots, NEVER EVER cross a runway unless you have been instructed to do so! The FAA's goal is that this "should" almost eliminate aircraft crossing runways when not instructed to do so. Personally, this is a huge change and controllers now have to "flip a switch" in their minds to use the new phraseology right now and hope the pilot gets it. Controllers have been expensively briefed on this and pilots have heard nothing about it. The FAA sent out an e-mail blast to people on their e-mail list and that's it. It's not known when this new phraseology will be added to the FAR/AIM, but the earliest is next year when the new version is printed for 2011. This is basically going to increase workload at many airports and controllers are going to have to pay extra attention to aircraft instructed to hold short of runways now because the phraseology is different. Also, this could get confusing for pilots because the phraseology being used implies that there is a hold short instruction in the clearance as was previously the case and there may be questions from the pilots as to whether or not they are supposed to be holding short of a runway/taxiway.
You will still hear the phrase "taxi to" but when it involves taxiing an aircraft to a runway it will be "runway xx" followed by the specific taxi route to follow. Controllers are allowed to say "taxi to the ramp via A, B, C" or any other point on the airport movement area as long as no runway is involved.