I did this already and our Pallet Compost Bin rocks.  I changed mine slightly from their project to add an elevated bottom so all the new dirt could fall through.  FYI: this thing is frickin' huge!

DIY Pallet Compost

Upcycle some pallets into a cool and functional compost bin. This pallet compost bin is simple to build and will hold lots of compost!

this one is nice... Homemade Compost Bin

Building a homemade compost bin from left over strapping and Building a compost bin is a great and easy DIY project that is useful and productive.

Wood Pallet Composting Bin

Are you composting? It’s free and easy, and a great way to take your ordinary scraps and turn them into nutrient-rich organic fertilizer for your garden.

Source: Instuctables.com

Easy to Build Pallet Compost Bin

Learn how to build your own DIY pallet furniture, with hundreds of projects and pallet ideas!

Compost bin

Potato Bin Tutorial for compost container - Great for the environment and your garden. Do NOT compost grass that's been treated with nasty weed killers however!

DIY Pallet Gardens - 20 Creative Ways to Use Pallets | 99 Pallets

DIY Pallet Gardens - 20 Creative Ways to Use Pallets

How To Make A Wood Pallet Vertical Garden DIY Project! I'm going to plant this garden this week!

Compost Bins from pallets upcycling / recycling

Compost Bins from pallets upcycling / recycling GARDENING multicityworldtravel.Com For Hotels-Flights Car Hire Bookings Globally Save Up To On Travel