Adventure Journey has updated their Top 7 column, this month naming the Top 7 Volcano Climbs. There are some excellent options here, spread out across the planet, so if you're looking to add a little adventure to your next trip, and would like to climb a volcano, give it a look.
On a side note, I really like Adventure Journey. The website is well designed, and there are always interesting things to see and read there. I do sense that they are going through some growing pains, as the site has been down a few times when I've tried to reach it, but the writing and content are top notch, and very interesting to read.