The Good: The “About This Page” info– if it works correctly (it’s a beta, I totally understand when things don’t work quite as expected…..especially when aggregating information from multiple APIs) the About This Page is a useful, central repository of data on a selected page. This feature could be incredibly useful to companies that want to see what people are saying about them, blogs that want to know what their readers think of their stories, and anyone curious about how their information is being perceived by readers. Like the other social annotation services, the “Blog this” option is excellent, as it immediately does a cut and paste + login + compose + automatic reference citation. The interface is also very straight-forward and easy to use. When you log in at diigo, there are no points of confusion, and you can easily access your bookmarks and annotated content wherever you are. I could have really used something like this in college.

The Bad: A few technical glitches, but that’s expected at this early stage in the game. The only other problem I see with diigo is that they are in an incredibly crowded space, but I like their angle.

Conclusion: Like most of these services, it would be unfair to spend an afternoon trying to scratch the surface and give a detailed review of the features. Now that I’ve got the Firefox plugin installed, I’ll continue giving diigo a shot. To me, it would be interesting to see a side-by-side feature comparison between the different social bookmarking and annotation services out there. But that’s for another day, as this is Sunday, the Patriots are playing now, and the Sox have game seven tonight. Priorities, my friends, priorities.

Facebook version of Diigo is coming soon, too. That should be very interesting.