My 5D Mark II just showed up and I'm looking for alternatives to Adobe Camera Raw and Canon Digital Photo Pro. Any suggestions?

I had the problem with CS3 not opening Canon 5DmkII RAW: I now convert the RAW to Adobe DNG using DNG Converter first. DNG open then fine in CS3.

The newest version of Lightroom.  You probably will say why didn't I discover it before 

Yeah, I've been playing with the DNG converter thanks.

Freezing, doesn't Lightroom use Adobe Camera Raw? Or is it a different converter.

Oh yeah, apparently it does use adobe camera raw. Do you have issues with adobe camera raw?

The version of Camera RAW which comes with CS3 does not support Canon 5DmkII RAW files: you need a version which is only compatible with CS4. I don't know however what version Lightroom does support.

Lightroom 2 has no problems with these files.

+1

Sorry didn't see how old this was.

Best,
Jonathan