AMD launched its Athlon 64 6400+ today, although it wasn't launched with any flair or even a press release, it was simply added to the price list. This 3.2GHz part dual core CPU with 2MB of cache is listed at US$251 in quantities of 1,000 units.
It does suffer from a TDP of 125W, same as the FX processors, so you need some pretty serious cooling to keep this chip from frying. It won't outpace any of the higer-end Intel chips and it's most likely the last of the current generation of chips from AMD that we'll see.
AMD also snuck out a new budget chip and a new mobile processor today, the Sempron LE-1150 and the Athlon 64 X2 TK-53. The Sempron LE-1150 is clocked at an even 2GHz and comes with 256kB of L2 cache and a TDP of a mere 45W. This CPU is listed at US$37 in quantities 1,000 units.
The Athlon 64 X2 TK-53 is clocked at 1.7GHz and has 512kB of L2 cache and no reported TDP. It's priced at US$144, again in quantities of 1,000 units.
You can find the updated price list from AMD here