For those of us who collect the more popular world bullion silver coins, these are currently available for purchase: American Silver Eagle Canada Maple Leaf Canada Wood Bison China Panda Australia Koala Australia Kookaburra Fiji Taku Mexican Libertad Somalia Elephant Britannia (supposedly a lot of quality issues with these this year) If I've missed any, feel free to add them. The only other 2 I can think of are the Austria Philharmonic (which I don't collect) and the Armenia Noah's Ark (an interesting coin, if you aren't familiar with it.) If you have obsessive-compulsive disorder like me, you'll probably want at least 1 of each.
The Andorra Eagle and the Cats from/for the Isle of Man come to mind. Not sure whether they are issued every single year though ... Christian