There has been noticed a great deal of fake e-mails regarding invitations to Google Plus, Google's new social network.
These e-mails at the first glance look truthfull but clicking on the link gets you on a pharmaceutical or some 'make 1.000.000.000.000,21$ a day online with only 25 seconds of work on a pc' website (...give me a break....), like any other spam mail.
People should know that Google Plus is not available for everyone because it has been working on a testing stage. Unless Google announces its official 'kick off', all such e-mails you receive are 99,9% fake.
For more info on Google+ check out this: Google+ : RIP Existing Social Networks?