Sony is gearing up to launch a likely Centrino 2-based update to its VAIO TZ ultraportable notebooks, according to evidence from an FCC filing and a string of forum posts. Called the VAIO TT, the computer would be one of the last remaining systems to launch with Sony's design update and is known to be too powerful to represent Sony's upcoming netbook; most specifications are unavailable, but the notebook will have 802.11n Wi-Fi, Bluetooth and optional 3G access over EVDO.

A listing at online retailer B&H for a privacy filter which supports both the TZ and TT also pushes the system into the ultraportable class with an 11.1-inch display.

While yet to be confirmed, claims have been made that the new VAIO would be introduced on Monday, lining up roughly with wider availability of ultra-low voltage Core 2 Duo processors that will be necessary for the update. Exact configurations are unknown but will likely include carry-over options from the TZ, such as solid-state drives. [via Sony Insider]