Pretty much everything I tired, I liked . These are very roughly in the order of how much they impacted the quality of my riding and my commute, though many things are more a tie than a preference. Anyway, none of these are crazy new products, just new to me, but I liked 'em.):

*36h rear wheel from Handspun w/ Velocity Dyad rim and Deore LX hub. So nice to have a reliable wheel!!!
*Topeak Explorer rack and rack trunk combo w/ MTX system and fold-down panniers
*Butterfly trekking style handlebars
*Surtly Crosscheck rigid fork (to replace the crappy stock suspension fork I had on my hybrid)
*PB Cascadia fenders
*Cateye Strada wired cyclocomputer
*Twofish lockblock for mounting flashlight to handlebars
*Nashbar front rack
*Axiom Lasalle pannier set - bought more for touring which I didn't get to due to some family issues, they've proven handy for those days I need some extra hauling capacity. If I use these on front and my rack trank on the back, I can carry A LOT of things to/from wirk/home.
*700x32 Vittoria Randonneur Tires

Hoping to try in 2011:

*Surly LHT frame
*Clipless pedals w/ MTB sneaker-style SPD shoes
*Avid SD-7 V-brakes
*Other stuff I don't even know about yet!