NWA 998 is widely considered to be the most important meteorite to ever come out of the worlds hot deserts. It contains ankeritic carbonates. The only other meteorite in the world to contain these is the famous ALH84001.
I have to do more reading on NWA998.
What is the latest news on it? The last article I can find is from April 2010 and it says they hope to prove something within a year... but it's been over a year and no followup article...