Several presenters at events such as TechEd and ITForum make use of a a really handy utility named "whoami". It's a resource kit utility that you can use to query attributes from your user context. Those of you who have experience of UNIX shell commands will already be familiar with a very similar command.
The image below shows the typical output for an administrative user running on Windows XP.
You can download the utility for yourself (for free) by clicking here.
Thanks Steve I was looking for this after you sent the output last week
WHOAMI is built into the Vista February CTP, perhaps it's going mainstream.
Indeed it is