In June, 2006, I posted about how I helped an online business selling thermal underwear obtain a contract through GSA. The online business recently informed me that the federal government placed two substantial orders for thermal underwear in the middle of June. Not quite selling ice cream to an eskimo but pretty close. The orders were placed through the online catalog GSA has made available to every federal and state government agency in the United States (now that's free advertising on a nationwide scale!).
For more information on obtaining a GSA Contract for your company check out this article titled What is GSA.
Apparently selling thermal underwear (and probably a million other products) is only seasonal if you do not have a contract to sell to the federal government. What does this mean to you? It should mean that you need a GSA contract for your business.