I really like that I was instantly drawn to your logo. I think the colorful one is too similar to crowdsourcing.org's logo (the multiple color). I would explore something beyond the calendar. However, I like the abstract people. I think #9 is really impressive. I would add some work to see if you can get a little more creative than a calendar.
I think the colors have become to dull/muted for our clients. The first bright colors you had were better. Try working on the calendar portion, maybe replacing it with something more unique/creative.