I bought a 2010 concours last month and so far have added
Two Brothers Black Series CF Pipe - biohazard cycles (best price I found, great communication and fast shipping)
Tech Spec Tank and Bag Covers - Tech Spec on Ebay (good best offer price, shipping took 3 weeks)
BMC Air Filter - Ebay
Zx-14 fender eliminator - ebay (fairly easy install, had to add a couple nuts and bolts, only $30 bucks)
Rick Mayer Leather seat from forum member - sits a bit higher, more comfy
Oil/final drive changed - damn that mobil 1 is expensive!
New Pilot Road 2 Front - jakewilson. good prices
Progrip - Gel Grips from murph's page. Cut the ends off and slid over the stock grips. Cheap mod but what a difference thicker grips as made. Can still feel the heated grips, but obviously not as much.
The PO provided a stock windshield since the bike came with a cee bailey's. I used the nightshades spray tint on the stocker, and very much prefer the look of a dark shield over a clear. FYI Rit Dye had no effect on trying to dye the windshield, but the rattle can tint worked ok.
The bike already has audiovox cruise, garmin gps, starcom hookup, upgraded rear rack, lowered pegs. I'm very satisfied how its looking and riding. I'm not sure what is next mod-wise, but I'm sure there will be something