You can use profiles.google.com/yourname (if you haven't excluded your profile from search)

This.

I don't get it. Google already has usernames - why not use them?

Antispam measure. They're trying to make it harder to figure out a user's email address.

You can use http://gplus.to to make a shortname though.

I guess Google doesn't need to care about SEO

gplus.to

..although it's not run by Google.

Maybe they'll end up getting gpl.us

You can use http://gotoplus.me , it's make vanity URL for your Google+ Profile like http://gotoplus.me/yourusername

And http://plus.ly