Update 31-01-2010: There is a new firmware version 1.33NA final that can be found here.
D-Link has released a new firmware for the DIR-655, version 1.33b01NA.
It’s not known yet what has been changed though it appears to be working quite well for people.
You can get it here.
Remember that this is the North American firmware so while it is compatible with other countries’ hardware it cannot be downgraded to pre 1.3x NA firmware OR to any other country’s firmware, so once you go NA, you can’t go back.
Also let us know how it goes in the comments below.