My view on the singularity - in terms of the technological possibility space - is largely consistent with my previous thoughts. Replacement organs will be commonplace in the 2020s (and I think robotic replacements too) and nanotechnology/even more intense robotic revolution will be 2030s. By the 2040s our technological capability will be beyond anything we can reasonably expect to understand by contemporary standards. What is changing is my views on the social, cultural, and political ramifications. I have actually spent the last year writing a paper (about 70 pages) with everything I currently think about the evolution of the universe and the 21st century. One of the final working versions before official publication in Foundations of Science will be up probably this month or next month.
I look forward to reading it, please let me know when you post it. I'm definitely no longer a "spring chicken" and therefore such advancements are welcome by me but I also think that they're likely to be very expensive, especially if they're elective in nature or preventative. No insurance company will cover such things.
Check out Fantastic Voyage if you want to learn about steps you can take now to prolong your life and increase your chances that you live well into the 2040/50s. Although there is more up to date material out there this is a good overview and place to start. Most if not all of the recommendations are still relevant. I'm just starting to take my biological maintenance more seriously (couple years from 30, so I'll be in my 60s around the 2040s - should be ok if all goes well (which of course is not entirely guaranteed, but not unrealistic) :D)