Until google rolls out google+ vanity or custom URL option to users, there is way out which lets you create a custom profile URL on google+ for your profile. By default google+ profile URL looks like https://plus.google.com/u/0/106176382343760155753/posts but you can now customize using a third party webservices called gplus.to which will ask you for a custom name and your profile id which is unique for you as you can see on the url above, the unique id is 106176382343760155753
Now in order to create a custom URL for your profile, copy the id in the id text box on gplus.to as shown in the image below.
Once you have specified your name and google+ profile id, click add button and then you will get a simple google profile URL which redirects you to your google+ public profile page.
Another web service http://plus.ly/ has also launched which allows you to create the google+ profile url the same way, and now you can have numbers as well in the google+ profile url you create with it.