Bonnie Swogger has a post over at the Undergraduate Science Librarian blog on her favorite iPhone apps for research and collaboration. Some, but not all, of these have come up in our "Life Could be Easier: On the Go" series, so I encourage you to check it out. She also has an older post on iPhone apps for scientific literature that may be of interest to some of you.
I think we need a page somewhere that has these listed...under tools or something... or researcher support...