Have recently joined Adsense through Blogger. I'd recommend this to other bloggers, since if you manage to build up some decent traffic you'll eventually earn some money for your trouble. Once you have an Adsense ID you can also participate in revenue sharing with other sites, such as certain article directories.
In researching this I've discovered that, understandably, quite a few people are concerned that having your Adsense ID embedded into another person's site might be seen as a bit of a no-no by Google. But apparently it's okay.
Still, I'd recommned caution if you are to do this.
For the time being I'll just stick with having Adsense on this site and see how things go ...