Hi Crobo,
I can officially confirm, that Season 2 of "Heroes" will NOT be starting until early April, at the very earliest.
Basically, BBC2 had intended to start Season 2, in the middle of January 2008. However, because of a) the Writers Guild strike in the USA still ongoing (which has delayed shooting and production on numerous US dramas including "Heroes"), and b) bad reviews of the first few Season 2 episodes from the public and press (resulting in "Heroes" creator Tim Kring offering a public apology for the incohesiveness and general not-very-good quality of these opening episodes, BBC2 has brought forward, and is airing Series 2 of "Torchwood" in the Wednesday evening 9pm slot instead, for the next 13 weeks.
This will take us into late-March/early-April, hopefully by which point, the Writers Guild strike action will have concluded, a decision on how "Heroes" Season 2 will continue (or possibly even conclude

), and how many episodes will make up Season 2, which will then dictate how it is scheduled on the BBC.
Hope that helps.
Pooch