Digg allows users to customize their profiles, giving additional information about the user beyond the user name and profile.

The most basic information that a user must post is:
1) A Name
2) The date that their account was created on Digg.
=> The addition of the date distinguishes between longtime users and new users.

In addition to this users may add:
1) Profile pictures
2) Gender
3) Age
4) Location

However, the only thing that shows up when a user diggs or posts a comment is just their profile picture and thier username.

The Profile:
The profile has four major areas of community identification.

1) The About section:
=> Users can add a short blurb identifying themselves past the 6 criteria stated above.
=> Ability to not only post weblinks to other websites you visit or own, but also your Instant Messanger Screennames.
=> Anyone can view these additions unless you mark them for "My Friends" only

2) Photos
=> Can be used as the profile picture
=> Limit of 25 images (however, on the site they recommend and link to Flickr, SmugMug, or Zooomr)
=> Photos must not violate the Terms of Service (no porn among other things)
=> File format limited to JPEGs, PNGs, and GIFs
=> No larger than 5 Megabytes.

3) Friends
=> Friends can be added manually or through: GMAIL Address Book
Yahoo! Address Book
Hotmail Address Book
AOL Address Book
Outlook CSV File
=> Or you can invite friends to Digg
=> Search also available
=> Digg allows you to track your friends activities and see what they have commented on or dugg.
=> You can also become a "Fan" of someone
=> Most users are either Fans of famous people in Meatspace (Frequently seen: Obama, Ron Paul, Clinton)

4) Most Dugg Topics
=> Lets any user view what topics you have Dugg
=> Time limit of 30 days, nonretrievable before then.
=> Sorts it out by the category
=> EX. 3 stories Dugg in the Comedy section in the past 30 days.

The use of the Profile:
Interestingly enough, many users don't use all aspects of their profile, and many censor the information for just their friends to see, closing them out from the rest of the digg community.

Following one popular Digg story, I took a look at the different users who dugg as well as commented on the page to see what their profiles were like.
=> Many did not have their about section filled out with any information visible to non-friends
=> Those who did have information filled out were older users
=> Sites that were posted were: Myspace, Facebook, Xanga, Pownce, Personal Blogs, Twitter, Flickr (this section is still ongoing)
=> Most seen instant messanging programs were: MSN Messenger, AIM, and Gmail Chat

Photo use:
Photo use wasn't extensive, mainly used to store other profile pictures for later viewing.
However, if users did have photos to share, they made a link to their Flickr profile in their Digg Profile
Other than minor identification, photos do not contribute to the Digg process.

Other information:
History:
Digg logs all Recent Activity on your account for any user to view.
=> Shows what you have recent Dugg
=> Any comments show up as well, without any context (however there is a link to the story to check it out)