Bungie has their latest update
on Halo: Reach
out giving you more info on all things Reach
. Some of the new info are that Elites in the game will be fast and more powerful as well as being bigger physically. There's a chance in damage done to those about to lose their shields. The example they give is that if you have 5 points of shield left and you do 10 points of damage, the extra 5 no longer carries into the health of the opponent. It's an interesting change and one that I do agree upon after I thought about it.
One of the new dynamics is evading where you can roll in a direction. I used to try this out on an Unreal Tournament
mod back in the day and it was disorienting at times but fun nevertheless. I did start using the dodge mechanic in that game after a while so perhaps the evade will be useful in that sense and maybe get you to an opponent quicker and in a more compact manor than running.
Finally, here's a look at a player using a jet pack.