Websites which interact with Second Life

One of the most fun things about Second Life, for me, is the fact that there's an entire programming language you can use to create things in Second Life - LSL, the Linden Scripting Language.  It's surprisingly powerful, and can even interact with external websites.

Someday I hope to learn how to create such things myself.  I will probably use the PHP programming language and MySQL (a type of database software frequently used on websites) on the external website.  I already know a little LSL, PHP and MySQL, but haven't begun working on such a project yet.  I expect it will be a fun and interesting challenge.

Here are a few existing websites which interact with things in-world.  Two shopping websites:

SLExchange - http://slexchange.com/

OnRez - http://shop.onrez.com/

And here's a website (which I think mainly features a forum) which you can only register for from within Second Life:

SecondLife Drama - http://sldrama.com/

Those are actually the only websites I know of off-hand which directly interact with scripts in Second Life, but, if I run into any more, I'll post them.  And, needless to say, everyone is welcome to add to this thread. :-)