To join the iSamples RCN mail list, or any of the iSamples Working Group lists, first login (or register) at http://earthcube.org, so your login name appears in the green bubble in upper-right corner. Then click on the green bubble with your username, and you should get to a screen with a row of tabs like those below. This is your profile screen. Click on Mailing Lists tab at far right. Then scroll down till you see iSamples and related WG's in the list, and check "on" the ones you want (and any others that interest you). Finally, scroll all the way to the bottom of the mail lists, and click SAVE.