Gday...

I doubt many GNs on our forum would be travelling via Oodnadatta/Strzelecki/Birdsville tracks ... but for information, they are closed due to rain -

http://www.abc.net.au/news/2015-01-12/outback-roads-and-tracks-closed-for-weeks-following-heavy-rain/6012248

http://www.dpti.sa.gov.au/OutbackRoads/outback_road_conditions/area_3_oodnadatta_track

http://www.dpti.sa.gov.au/OutbackRoads/outback_road_conditions/area_4_strzelecki_and_birdsville_track

Cheers - John