Overeager future Google+'ers are also taking a risk by posting their e-mail addresses in the comments of many stories across the web on the topic, aiming to get that coveted invite. Doing so can open you up to spam -- and with the recent spat of hacking, possibly put you at risk of even worse.

So here's a suggestion. Be patient. Chances are that a friend of yours will soon be allowed in. Get an invite from people you know, not some stranger on the Internet. Beware of any person on the web offering an invite in exchange for personal information or payment. It's much better to be safe than sorry, don't you think?

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