I dont think I have found anything useful for the iPhone or PC that I have liked so I am looking forward to seeing this. The basic things I cant seem to find on the others is:
1: Import and Export to Excel or other .csv format file
2: Be able to update / re-arrange column headings. There's lots of different log book structures out there so something customisable would be nice.
All the other things mentioned so far are good as well
PiperArcher