Stumbled upon this reply by chromatic to princepawn which says:

vroom gave himself a million XP, when some people started getting close to his natural level. I don't have a problem with that, either. I think he's done a wonderful job on taking a complex piece of software, extending it to meet his vision, and keeping it running ... vroom started this site, he took a good idea and made it real. His job is to keep it running, and his company foots the bills. Yes, it's the content from users that attracts and retains new people, but your overinflated claims of tyranny and injustice ring rather hollow.

Update: Super Search found some more links:

• RE: Saints: # of writeups vs. XPs by turnstep
• Should Perl Gurus (Wall,Schwartz,Christiansen et al) receive mega XP based on who they are? poll by vroom
• RE: Ability VS Site Contribution by davorg (suggests merlyn was given one million XP after he was seen frequenting this site)
• Re: Re: Chapter 714: The Long Chapter by turnstep (states that merlyn started with one million XP but asked for it to be removed)
• (jeffa) RE: RE: Monastery Mores by jeffa (states that merlyn asked for his mega XP to be removed)
• Re: Who are the bishops? by moritz
• Re: Who pays Larry Wall? by ambrus
• Re: Mega XP ??????????? by SuicideJunkie
• Shadow Conspiracies, Experience and General PM mayhem by vroom
• Voting and XP SuperSearch by ybiC

Update: Yikes, I just noticed -- presumably to balance the books following the one million XP gift to vroom -- that Perl Monk antivroom has XP in excess of minus one million (-1,002,949 as I write this)!