fast turn-around
The administrative-support folks at my company are
fabulous. The most recent instance of this comes
from a conference I'll be attending this fall.
After I finally got an authorizing signature on
the relevant form (which took weeks), I asked about implementation.
"Oh, [name] will take care of that for you." That
was Friday. I now have a hotel registration, a better
plane ticket than I'd been able to find on my own,
and conference registration, with me not having to
do anything more than provide the URL and
approve the flight. Nifty.
Not that I've done this a lot, but at every past
employer I've had to do the leg-work -- and, by the
way, buffer some things on my own credit card.
(ACM SIGDOC, the best conference I know of for technical technical writers. I wonder if I know anybody in Memphis, or anyone else who's going.)

no subject
I've only been to one other instance of this conference, in 2000, and it had a high density of useful sessions. It was also a small-enough group that you could actually talk with other attendees usefully; while I'm not very good at the social and networking games, I at least didn't have to fear completely getting lost in the crowd.
I don't find the STC conferences as useful for the kind of writing I do. They seem to be much more focused on end users (whether software, magazine readers, or whatnot), with fewer assumptions about domain knowledge.