Other World Computing (http://www.macsales.com)
has announced the immediate availability of OWC
DDR3 1066MHz Memory Upgrade Kits up to 8GB for
the new "unibody" MacBook 13-inch 2.26GHz model
announced by Apple last week. Available are:

° OWC 2GB DDR3 Memory Module (1 x 2GB memory
module) -- US$44.97. It replaces the existing
factory installed 1GB memory for 3GB total. The
upgrade isn't available as a factory option.

° OWC 4GB DDR3 Memory Kit (2 x 2GB matched memory
modules) -- $87.99. It replaces the existing
factory installed 2GB with 4GB total.

° OWC 4GB DDR3 Memory Module (1 x 4GB memory
module) -- $247.99. It replaces the existing
factory installed 1GB memory for 5GB total. This
upgrade isn't available as a factory option.

° OWC 8GB DDR3 Memory Kit (2 x 4GB matched memory
modules) -- $475.99 It replaces the existing
factory installed modules with 8GB total. This
upgrade isn't available as a factory option.

Additional savings are available for customers
who take advantage of OWC's rebate programs for
Apple factory standard memory modules and factory
installed hard drives. With the rebate, OWC's 4GB
Memory Kit for the new MacBook 13-inch is a full
18% lower cost than the same size factory
installed upgrade while a 500GB 5400RPM hard
drive from OWC is a full 53% lower cost than the
same capacity/speed spec drive upgrade offered by
the factor, according to the folks at OWC.