Nice and easy :) No need to rely on 3rd party services for this and you can use your own brand etc. like http://www.gxm.co/+
How to set up a "yourdomain.com/+" redirect in one .htaccess line:

RedirectMatch ^/\+(.*)$ http://plus.google.com/YOUR•PLUS•ID•HERE$1

For example, mine is:

RedirectMatch ^/\+(.*)$ http://plus.google.com/114592751246503219483$1

This causes http://dsandler.org/+ to show my posts by default but allows you to append "about", "plusones", etc, e.g.: http://dsandler.org/+/about .

(Inspired by +Ade Oshineye and many others.)
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