Get a bunch of balloons with jelly beans or other assorted candies as weights then go into the office and hand one to each person, like a flower.
Get a bunch of flowers and hand one to each person
Get a single bernard callebaut chocolate for each person
Send them a dvd of a movie, pay it forward perhaps, and a bunch of bags of kernels popcorn (perhaps with approval from their boss for a movie day at work?)
A bunch of bags of Kernels popcorn
Depending on the number of people get each person a neat pen $5-10 range that they would never buy themselves
A bouquet from Edible arrangements.
http://www.ediblearrangements.com/
Get a small flowering potted plant for each person
Just a big ass basket of goodies from a basket place or make your own
A really decadent cake from Decadent Desserts or Sunterra
Some kick butt cupcakes or cookies
http://www.cravecupcakes.ca/main.asp
There.
Also,
HOOKERS AND BLOW