Judging by last year, from March onwards. UK announcements expected in February. The equivalent 50PZ80 is available in the US in March with the new Neo-PDP panels.
TC-P50S1 Neo PDP; 1080p Resolution; March, 2009
Full-Time 1080 lines Moving Picture Resolution , VIERA Image Viewer(TM); VIERA Link(TM);
600Hz Sub-field Drive; AR filter; Game mode; 3 HDMI inputs; Contrast Ratio: Native 40,000:1 Infinite Black Panel