Perhaps the coolest thing ever to hit invasive species awareness, Weed Wipeout is an online, Flash-based video game where you play a Australian farmer trying to rid your land of nasty invasive plants. You start by stocking up on supplies: limited by the money in your pocket, you can choose from a variety of control methods, from herbicide to controlled burning. To score high, you need to apply the right control methods to each invasive plant. I made it through the first round with only a low-level threat left (darn Paterson's curse!), but I felt like I was a little heavy-handed with the herbicide :-).
Thanks to a member of the Yahoo! group ma-eppc for posting about the Weed Wipeout game.