Several of us are still getting long ugly strings when logging in through OpenID. When I use Google, I get a string but it has my name in it. I was getting an ugly string when logging in via Yahoo! but I found that the OpenID in Yahoo is configurable. it defaults to the long ugly string, but you can set it to something much more manageable.
Some are getting a similar string for Google, but I have not yet figured out how or whether this is configurable in Google mail settings. If anyone figures this out, please advise.
If you want to avoid strings and configuration issues altogether, use Facebook or set up a Typepad account.