Where are the iPod touch knockoffs?
asymco.com
asymco.com
The reason nobody else has been attacking this market is because the iPod touch has been priced much cheaper than any of the Taiwanese OEM shops can compete with — it only costs a little less to make than an iPhone, but costs $400 less! Apple is purposefully cutting their margins on it far below their other products.
Samsung can actually compete since they're vertically integrated. They don't need to be producing millions to get the volume to meet that price point — as the manufacturer of CPUs, LCDs, and Flash, they are volume.
This will be the first real attempt at competition in this space since the Zune HD (which was originally more expensive, but later discounted). No, none of the Archos PMP products count, they're stupidly expensive, sucked balls, and the Android ones shipped ancient broken versions with no Google apps or Marketplace.
EDIT: Looks like it might not be sold in the US, and it'll be significantly more expensive than the iPod touch at €229 for 8GB and €299 for 16GB.