When Steve Jobs announced five new apps for the iPod Touch yesterday, people were ecstatic -- for about ten seconds. Once he mentioned the upgrade would cost current iPod touch owners $20 (they're included on all new units), most of the comments from participants following the keynote in TUAW's IRC channel were largely unprintable.
Apple's customers aren't usually the sort to take things lying down, however, so now there's an online petition calling on Apple to make the apps free to current customers. As I write this, there are close to 600 signatures and climbing.
It's worth noting that Michael Rose and John Gruber pondered the possibility of iPod touch updates and user costs back in October 2007, as Apple's quarterly earnings report indicated that the iPhone's subscription accounting model was not being used for the touch. At the time it wasn't clear what would happen when functional updates to the iPod touch were released; now we know that they come with a price tag.