There is a company on eBay selling extra memory for Powerbooks, I was wondering if anyone has purchased memory from them? Are they a good company? Have you had any trouble dealing with them? They have 100% positive feedback, but it is possible to buy positive feedback through eBay. The memory is called Optival and it comes from a company called Omni Technologies. Please let me know if you've purchased memory from them and had a good/bad experience.