Simple, But Very Clever

I was reading some articles on PCWorld (see my last post to find out why) and came upon an interesting link in one of the comments.  The link took me to SuperFiller.  It's a simple service which helps solve a problem I have all the time.  Have you ever put together an order on Amazon where all the items qualify for free shipping, but the total is a bit shy of the required 25 dollars?  Well, as the front page of the site shows, you can ask SuperFiller what items are available on Amazon for $1.47, or whatever amount you need.  It's simple and probably wasn't very hard to code, but someone had to think of it.

p.s. I'm guessing they make a small amount of money on each purchase through Amazon Associates referral fees.