I just noticed that, for some reason, yesterday my rim photo and link got dropped (accidentally deleted by yours truly) so here it is again. Carver's new carbon 29'er rim. 450 grams (about 20 grams lighter than a stans arch) and rock solid. You can read more about them here.
I don't think they are available to the public just yet but they should be by summer. Pair this stiff rim to the already stiff front end of the King Kahuna, some DT Swiss 240s thru-bolt hubs and some super secret black spokes and I should be tracking like a missile this summer.