Came into some extra time this afternoon, sooner than I thought. I downloaded the app. It works much like facebook. You can search for people to add to your friends by inviting them with email, search by member name, and search by species and location.
It allows to post tihngs such fish caught, fish missed, fish activity, hot spot and others under creating a personal report.
The map allows you to define your area.
The catches can be customized to your liking to see everyone on Catchbook, filtered by most recent/comments, filtered by everyone, just my friends, just me and some advanced filtering.
I think we should add each other as friends of pond boss. It would be neat to see different reports from different members.
Some other thoughts:
I think the outdoor world is starting to use apps to its tech savvy users in great benefits. I wish it would be expanded to the Android and Blackberry devices. Maybe it will be expanded.
For people like me, I have iTouch and Android mobile device. So I could not do in the field reports.
I hope this helps. Omaha can add his thoughts too.