See bottom of post for update.
I've finally had some time to go through my emails and do some more searching for reader requests! Reader Rachel wrote in looking for an alternative to the Cambridge Satchel Company fluorescent satchel, specifically in the bright pink color. This bag retails for $170 at J Crew.
Steve Madden has a great alternative to the bag above, retailing for $78 and it comes in a variety of fluorescent colors. Click on the image below to purchase.
*Update - 12/20/11* - This bright yellow satchel from Old Navy is also a great alternative. It retails for $19.94 and also comes in black or white. Click on the image below if you're interested in purchasing.