Yep, still having one built.
http://www.nw-wheelers.com/forum/showthread.php?t=6805
The shop doesn't look much different than the last picture and I am having a very hard time getting the yahoos to come over and finish it, that last picture was before thanksgiving.
Pole building are NOT very sealed either. The corrugated siding has holes top and bottom, there are plugs to deal with this but I'm just going to foam all the hole, this also go for doors and windows. I believe the plugs plus a house wrap would seal the shop up fairly nice.
If your going to insulate more than just standard blank they give you, get commercial girders. These Girts run 24" on center (see pictures at link above) and flat between posts similar to a wall on its side. Insulation will fit in-between and sheet rock on top with a few extra boards. If a standard girt is used, it requires almost building new walls inside to run batt insulation.
Also make sure you get the correct height, a 12'-0" pole building will give you about 11'-0" under the truss.
Get the tallest doors possible.
Smaller vent windows placed high on the walls would be nice for summer time heat venting.