1. A choice of wheel sizes; 4 big ones, 4 smaller thin ones and 2 small wide ones.
2. Three lamps, that connect through the converter cables to the motor ports. (The sensor ports do not supply enough current.)
3. The rechargeable battery, I promised a while back a photo with the charger connected. (Though I had to cut out the several feet, >=1m, of wire.)
4. And of course the minifig, with choice of baseball cap or ponytail, something else I promised a picture of.
5. The LME NXT software includes blocks for the old RCX/Technic motors, the Technic lamps and the old RCX sensors (touch, rotation, light & temperature). As shown below. Hopefully these blocks will be available as a downloadable add-on for the shop bought kits when the conversion cables go on sale.
Important note: Lego Education kits are distributed according to territories. I guess this is to do with providing support to the schools and colleges who make such purchases. You should order from a company that distributes to your delivery address. You can local distributors from this page:
http://www.lego.com/education/default.asp