Great ideas!
Like CDsSister, I think it would be really useful to be able to see the data posted by other members about bloom/harvest dates. If we could search for the data collected nearest to our ZIP code through a link on the specific plant's Plantfiles page that would be wonderful. It might take a while to collect enough data for it to be very useful but eventually it could be a wonderful tool for planing a new garden, particularly when using plants that you haven't grown before.