Volcano Café has compiled a convenient list of the nine “New Decade Volcano Program” candidates announced thus far and invited speculation about the top spot on the list. A few weeks ago I wrote about Lake Kivu in the East African Rift, which is ominously close to Nyiragongo. I guessed then that a volcanic complex involving the lake would be first or second on the list, and I still think so. The most dangerous volcano on the planet, to the best of my (superficial) knowledge, is likely the Nyiragongo/Lake Kivu combination.
Here’s a rather overdramatic but interesting NOVA program on Nyiragongo, with mention of Lake Kivu:
Update: It looks like Nyiragongo and associates will not be #1. According to one of the listmakers, “Of those 16 originally chosen [in the original Decade Volcano Program], only one – Taal – meets our criteria.”