Here this will help you a bit. Its from thier site.......
I see some orange flashing lights on the main page – what do they mean?
No, you aren't seeing a side effect from your allergy medication. You have found a Woot-Off, a short term frenzied mutation of our product posting procedure. In Woot-Off mode, a new product is launched immediately after the sellout of the previous deal. There is a half-Woot-life of 12 hours maximum on any product within a Woot-Off that does not sell out. The number of Woot-Off items, sequence, and quantity will not be announced. When Woot-Off mode is over, the orange lights will disappear and our normal schedule will resume. Depending on its success, this may be a mode we would go into once or twice a month for a relatively short duration of time (24-72 hours generally.)