Who could win the championship and who couldn't and Why?-

Kimi or Lewis...lets be practical...Kimi and lewis are the only championship in realtime 2008 formula 1 worldchampionship contenders other championship contenders and their flaws or demerit--
1.felipe Massa-Damn inconsistent...gets a pole and mid race becomes so charitable goes on to gift his position to others,consider kimi...even if hes starting from pits u can say he may finish on the podium....but in the case of massa only if hes in the top3 he ['may'] finish on podium and there are cases when he has lost his well earned poles to other!!!!
2.Robert Kubica-He's a great driver could win the championship surely but for that BMW-sauber car which needs a bit more fire to match the pace of McLaren and Ferrari.
3.Fernando Alonso-explode the factotries of BMW,Ferrari and McLaren now that renault could be a tob team!!! and help Alonso win the championship...if the engine doesnt blow up!!!
4.Nick Heidfield-if heidfield can win the championship than Kubica has already won it!!