If I ran the Office and we were sticking to the plan to jump ahead and skip everything that happened while the Writers' Strike was happening, this is what I would do:
What I would do is produce the Dinner Party script from before the strike and have the episode set back in Fall of 2007. Into the the script I would insert a little subplot, maybe not even a subplot but a few comments that there was a rumor going around that the warehouse workers (all of the workers at all of the branches) looked like they were going to go on strike because they weren't allowed to unionize in the third season. Just rumblings, that's all.
Jump to the next episode, April 17 2008, turns out the workers DID go on strike and now the strike has finally ended and everyone is returning to work for the first time in months and months. Plot-points have been left on simmer, no major developments while we were away (unless my writers come up with some good twists. They need to get back to me on that).
That's what I would do if I ran the zoo.