Is it wrong/biased to believe we should prioritize extending the longevity of our current bodies over "life extension" projects that can only work with brain emulation/simulation? It strikes me as far more likely to gain public support, or at least gain mainstream approval.
I'm with you; of the items that christina originally listed, SENS is the really important one. Nonbiological nanodevices or nanoconstructs might be useful as delivery systems or probes, but mostly we should be interested in biology all the way, e.g. designer bacteria as "medical nanobots". Full-spectrum nanotechnology, and techniques for storing brain information, are really about opening the abyss of posthuman possibilities, and that's a severe challenge whose resolution ought to be intimately involved with however the human attempt at coexistence with artificial intelligence works out. But human rejuvenation is comparatively :-) straightforward and should be on everyone's to-do list.
For those who are interested in this topic, I'm just wondering what longevity research today looks most promising to you and why. Whether that's SENS, cryonics, nanotech, brain uploading, etc is fine with me. Any links to actual research papers would also be greatly appreciated. I'm very interested in longevity, and am curious to see if anyone else would like to offer some thoughts on the current state of the art.