Since I've got more than 400,000 acorns, how can I spend them? How do I get to these acorn raffles?

The raffles are on the homepage when we launch them. You can see this month's raffle at:

http://garden.org/ideas/view/d...

And I think you may be mis-reading a number somewhere. You don't have that many acorns. In fact, nobody has anywhere near that many acorns. Only one person on the site has more than 20,000 acorns.