The Kindle Fire HD now has a dual-core 1.5 GHz processor, 1,280X800 resolution and 8 GB of storage, as well as a lower price than its predecessor.
http://www.notebookcheck.net/Amazon-updates-the-Kindle-Fire-HD-with-dual-core-1-5-GHz-processor-and-216-ppi-display.102570.0.html