Who would have guessed Second Life was so involved. Stuart, you should create a Second Life ebook to teach people how to make money from the site.
I would say from the looks of things it could be quite lucrative. Just the best was to buy and that might increase in value part of it would get a lot of people interested.
I could see chapters like, how to mingle with the people on Second Life. How to get the most money fr your creations. How to get people to populate your land or get more people "camping" on your property.
You could even title it,"How to make a living from Second Life The Game!"