I took 1 hr out of my busy schedule to remove that pesky emissions canister. The how-to on the tutorial board provided an excellent example of how to do this. I followed this guide pretty closely. I did not find it necessary to put washers in place of the aluminum emission canister cover where it connects between the rearset and frame. The cover is relatively thin and the spacing can be made up by tightening the bolts a bit more.
See:
http://ducatimonsterforum.org/index.php?topic=2514.0There is plenty of information on the procedure but not much feedback on changes in motorcycle performance. I thought I might comment on the change I noticed to my '02 M900ie with 3,400 miles.
After letting the bike sit for 24 hrs (to ensure the thread sealant had cured) I fired it up. It started with less hesitation than usual. After the engine had warmed up enough to idle I took back the choke and noticed immediately that it operated more smoothly. Prior to the removal of the canister, the engine had a bit of a jumpy idle. I wouldn't say that it is a night and day difference but it is a pleasant change.
I cruised at low RPMs for a few minutes to warm the engine. There is less engine sputter on take off and a smoother power delivery at low RPMs (1,500 - 4,000). Once warmed, I explored the higher RPMs. There isn't a noticeable power difference but I can say that the power delivery has been greatly improved. Prior to removal, giving the bike full throttle (even at higher rpms) would result in a bit of hesitation and a typically rough climb for several 100 rpm. Now, full throttle feels like butter. The throttle response is instantaneous.
Final thoughts:
The bike feels faster and sounds better.
If the removal of the emissions canister is legal in your state, I highly recommend doing it.
If you have any helpful information or feedback please comment.
Legal stuff:
Doing any of the above shall be at your own risk. This procedure should be performed only by technically competent individuals. I am not responsible for damage to you or your motorcycle. 
