Last night I learned about graphical deadlock graphs from Fargham Butt of Microsoft.  I had simply used the traceflag and then read the error logs to find the information.   Thus today I thought I would write a blog about the subject and decided to do some research first when I found an excellent blog post by Jonathan Kehayias (B|T) covering Handling Deadlocks in SQL Server.  Jonathon is a Microsoft Certified Master and does a much better job than I can do explaining the whole subject, so I thought it more prudent to just refer you to his blog.  Give it a whirl and enjoy!