In no particular order:
1- Ti-Tri/Inferno stove-- great combo, user-friendly wood stove, super-efficient alky
2- LT4 poles-- I hated trekking poles before, then tried these, and now can't imagine backpacking w/o them
3-Tied: iTP A3 EOS Upgrade light-- from Goinggear.com-- 9 grams for an 80 lumen (adjustable down to 1.5 lumen), orange peel reflector (for throw) light. Add a few grams for the clip, a few more for a AAA battery.
3-Tied: Grohmann Boat knife. Certainly not new, but new to me, and my idea of the perfect backcountry knife.
Honorable mention: Merino wool, especially Patagonia's wool 2 zip-t and wool 4 hoody. I'm thrilled w/the great performance of merino, and can't seem to own enough of it, even for daily wear.
MYOG top 3:
1- 4.5 oz down vest
2- 19 oz framed 55L pack; parts blew apart on the trail, but were repairable, and the overall performance of the pack was great
3- "Ugly hat" of climashield and 2.75 oz down booties