How to Build Your Own Social Network with Elgg
Here's a short presentation about Elgg Framework from a technical perspective. Elgg is probably the best and easiest solution if you want to build your own custom social networking site, whether you're building a private site for your organisation or a public community with thousands of users.
From a developer's point of view Elgg is an excellent framework to work with. It's easy to extend using the effective plugin system and the Elgg API and datamodel make development easy and fast. Personally, I'm a big fan of Elgg and I've been working with it since the 1.0 version was released about two years ago.
Don't hesitate to contact me if you have any questions or want to know more! Or head on to the Elgg Community for more information.