Other World Computing (OWC) announced Wednesday 4 GB memory upgrade kits for the new MacBooks and MacBook Pros Apple announced on Tuesday. OWCis price on the modules is US$95.99, which compares to the $400 price Apple is asking if you configure your MacBook or MacBook Pro with 4 GB of memory from the Apple Store. OWC will sweeten the deal by offering a $20 trade-in for the the two 1 GB modules you replace in your laptop.
You can find more information on the offer at OWCis Web site.