This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Juno is last year's version of Eclipse, Kepler is this year's version. New versions of Eclipse come out around the end of June, beginning of July. And yes using the marketplace is the preferred way to get the latest m2e plugin.