Since the cat is out of the bag now, it looks like SmartHome has started posting these new devices on their website, along with pricing and shipping details.

• LampLinc - INSTEON Plug-In Lamp Dimmer Module (Dual-Band), 2-Pin
  Ships 12/11/2009 and will retail for $49.99 (Item # 2457D2)
• PowerLinc - INSTEON Serial Interface (Dual-Band)
  Ships 11/20/2009 and will retail for $89.99 (Item # 2413S)
• HouseLinc 2 - INSTEON Desktop Software with Serial Interface (Dual-Band)
  Ships 11/20/2009 and will retail for $159.99 (Item # 2413SH)
• HouseLinc 2 - INSTEON Desktop Software with USB Interface (Dual-Band)
  Ships 11/20/2009 and will retail for $179.99 (Item # 2413UH)
• PowerLinc - INSTEON USB Interface (Dual-Band)
• Ships 11/20/2009 and will retail for $99.99, but is on sale now for $22.97 (Item # 2413U)

There is a short blurb on SmartHome's website explaining Dual-Band:

The dual-band interface sends and receives both powerline and radio frequency (RF) INSTEON signals, so it doubles as an Access Point. This makes it ideal for new INSTEON installs and if have or plan to use an RF-only INSTEON-compatible remote, thermostat, motion sensor and contact sensor.

Updated: SmartHome just posted the USB PowerLinc, on sale for $22.97.