Ok, I've been a big user of del.icio.us for the last few months and found a great add-on service called Diigo that allows you to extend the detail stored in social bookmarking but has backwards compatibility with del.icio.us with new features such as note taking etc. It allows you to not only bookmark the site but also for it to remember any sticky notes you add to the page etc. which is awesome for researching areas!

Group sharing function

It allows extra functionality over del.icio.us such as sharing bookmarks with groups in a better way than just referring like the del.icio.us. The comments you make are also visible and when you add a bookmark you can also see other users comments also enriching the experience further. The notes are in full rich text editor as well which is a bonus!

The group functionality allows you to add bookmarks to a group to share it around and also has a forums section also. There is a SharePoint group already out there but to date there is only 4 members!

It allowed me to select the SharePoint tag in diigo and then share these links with the SharePoint group which is an awesome way to share your links in a community.

Integration with del.icio.us

There are over 28,336 links in del.icio.us on SharePoint tag and from my experience with diigo I can see a lot of people moving to it and the great thing is it imports all your del.icio.us bookmarks in natively as well as when you adding them to diigo adding them to del.icio.us! Note it is not a synchronising tool.

Unread function

It even adds a check box to tag the link as unread to go back to it later...whereas to date I've been adding a tag called unread and deleting it at a later date. It's an excellent enhancement to the social bookmarking space!

Notification function

I really like Steve Pietrek's feed which is a posting of his links directly in his blog. The problem I found is that his links are basically already shown in my RSS feed that I've subscribed to already, but I always seem to find that he has a new blogger that I haven't found already...this group facility is another way to expose this information.You can subscribe to the link feed on an immediate basis, daily or weekly to receive an email OR subscribe to the RSS feed. Now all I need to do is convince Steve to use diigo ;-)

The collaboration group is also very interesting with over 220 members aleady!