First of all, let me thank anyone who's kind enough to give me some advice. I'm a PC geek. I've been building PCs for years, I do web development, and some graphics work. I am not necessarily a Windows fan boy, but I am extremely familiar with the OS and feel very comfortable that I can rescue my data regardless of what might happen. I've made the decision to buy a Macbook for various reasons, but primarily to give Mac OS X another attempt and too have a decent machine to do it on. I'll be buying the basic white model with 1gb ram, however, I noticed today that Apple has refurbished units with the same warranty for less money. For me, this is very tempting, as this will not be my primary machine, and I'm looking to save some cash. Here's my questions. Can I swap out RAM in a MacBook as easily as I can in a PC notebook? What type of RAM does the MacBook use? I'm assuming DDR 400. Are there any restrictions on brands/types because of the board or setup in the MacBook? Does Apple offer any upgrade protection for the upcoming release of 10.5 or once I buy a Mac with 10.4 am I forced to shell out the additional $100 for the next OS update? Has anyone bought a refurbished part from Apple, if so, was it in good condition? Any problems? Again, I appreciate all responses. Again, I'm going to buy this as a test, if I like it, I might consider switching, but I have no intention of doing so at this point.