If you use a Keurig K-cup brewer, there’s a great alternative to throwing away hundreds of K-cups per year, and that’s a refillable/reusable cup like this one from Ekobrew. For $17 (Amazon link), you get a stainless steel cup that you can fill with your favorite ground coffee. There’s also a plastic version available for ~$8.
Keurig has a new machine out (the Vue System), and are leveraging social networking to help promote this. They’re taking applications for free Keurig House Parties. They provide the machine, coffee, etc, you provide the people. Sounds a bit like Tupperware. Note though that this new Vue system isn’t compatible with current K-cups.