In my previous post on the Grand Prix (see 2008-2009 Grand Prix, Elista), I mentioned that the official site (grandprix.fide.com) was badly out of date. It looks better now and the results from Nalchik have already been added to the overall standings. Navara is still listed as active, unlike Al-Modiahki and Pelletier, who are listed as 'excluded'. The status of the three players went into limbo when their sponsors, the organizers for three different Grand Prix events, withdrew.
According to Kirsan Ilyumzhinov at Elista FIDE Grand Prix (15 December 2008; Fide.com), 'the fifth tournament will be held in August 2009 in the capital of Armenia, Yerevan'. The venue for the sixth and last event is unknown.