[yapc] set your Nickname for better wiki experience

[Darren Duncan]

Some of you may be having a problem when editing the YAPC::NA wiki, finding that 
your "[user:foo]" aren't working like other people's.

Where some people who put that on a wiki page find it rendering as "My Name 
(foo)", others it shows literally as "[user:foo]".  You may have found that the 
only way to get a link to your profile is to instead say something like 
"[user:123]".

Thanks to an unsolicited private email from Gabor Szabo, this problem was solved 
for me, by filling in the "Nickname" field in my conference profile 
(http://act.yapcna.org/2012/change).

Seeing as the wiki has numerous instances of "[user:123]", including 4 more on 
the Arrival Dinner page, I see that many others are having this problem, and now 
hopefully you know how to fix it.

-- Darren Duncan