Are the Keurig K-Cups safe?
According to the Keurig website:


  K-Cup® and Vue™ packs do not contain BPA and are constructed using FDA-approved food safe materials. We also use FDA-approved food safe materials in our K-Cup® and Vue™ brewing systems, and neither system contains BPA within its water paths (as of January 1, 2010 for our K-Cup® system).


I therefore would definitely say you need not be concerned, and if you are worried about BPA consumption, make sure you have a newer machine!