Other World Computing has released the Mercury Aura Pro Express 6G SSD upgrade kit for 2011 MacBook Airs. The SSD releases some serious speed in the latest MacBook Air models thanks to their SATA Revision 3.0, 6Gb/s buses.
The Mercury Aura Pro Express 6G will give the 2011 Airs over 500MB/s read & 450MB/s write speeds. OWC says real world use will be up to 68% faster than stock MacBook Airs from Apple and that critical 4K random reads/writes will be up to 3.5X faster. Pretty impressive.
The upgrades don't come cheap, however. A 120 GB Aura Pro Express 6G costs US$349 and the 240 GB model costs $599. OWC also offers Mercury Aura Pro Express 3G SSD upgrades for both the 2010 and 2011 MacBook Airs. The 3G variety runs at over 275MB/s data rates and cost $319/449/1227 for the 18/240/480 GB models.