Facebook - How to engage and interest people.....

I have been a Facebook user for a couple of years with somewhat mixed feelings. I like being able to peek in on the lives of old acquaintances but generally people's use of the tool is limited so it's not like there is too much to keep me interested.
I have joined a number of Facebook groups but again I notice that they tend to be very dormant and I haven't yet worked out how to subscribe so that new posts come to my mail box. Basically that leads to inertia and Yahoo groups seem to offer a more dynamic experience.
The one killer functionality on Facebook for me is the ability to become a fan of a product, musician, writer etc. This is the only aspect of Facebook that works for me because I am finally getting  a lot of new and interesting content.  The Irish social networking guru Damien Mulley has pointed out many times on his blog that there are countless commercial opportunities to engage and interest potential customers using  Facebook.  Luckily people from many different domains are now getting that message. The three top pages on Facebook for me are that of my current favourite band The Veronicas (see pic) (updated with photos, videos and posts daily), the language learning provide JapanesePod101.com (regularly updated with content that is not always easily visible on the website) and the Irish clothing company Hairy Baby (product updates, discounts, requests for ideas).

When you know how Facebook can be used you start getting a bit annoyed with bands, artists and companies who are behind the curve. If I am interested in you I am at your disposal on Facebook, feel free to engage me and keep me interested in what you are doing.