So..... signed up for myflightbook last night and finished entering my logbook this morning (except for comments). So far, its just what I wanted.
Simple, straight forward, and the data syncs rapidly between devices (iphone and ipad). The "what airports have I been to" map is neat. Overall, for a backup to my paper book, its good.
They also have an option to upload scans of your logbook endorsements..... very nice.
Downside, night currency requires adding a field for "Night Takeoffs" in addition to specifying how many "Full stop" night landings you had in the data entry section.