Hi.. I recently purchased my MBP and have a few Questions I am looking to purchase a portable external Hard disk .. I plan to go for the Western Digital Passport 250 GB http://www.westerndigital.com/en/products/Products.asp?DriveID=317 Now my question is .. Will I be able to use this HD with my MBP and also my other Windows PC and Laptop (just in case i want to connect this HD to my Windows based PC running Vista or XP [SUCKS!]) can i simply plug it out from my MBP and plug it in my PC? or will there be any compatibility issues? etc.. Is this choice good (WD passport) or u recommend another product? Also am planning to buy the Original Apple wireless keyboard and mouse... is the wireless option good? or should I go in for the wired mighty mouse etc? Is there a third party wireless KB and Mouse that is a good alternative? Also can somene help me with a link to a site/webpage that help new mac owners with keyboard shortcuts etc etc? I am finding it very frustrating .. I dont know how to switch between browser windows coz dont see anything similar to the windows taskbar which shows the different windows.. plus the alt+tab option? If i want to switch between several firefox or Safari windows on my MBP? So any link which gives clear and good info for a new Mac user.. whos switching from a PC to a MAC Also any links to must have apps for the MBP.. Lastly. I have an external Sata Hard drive which am currently using with my Windows based PC and Laptop.. If i connect this to my Macbook Pro using USB will it work or will there be any compatibility issues? Coz I remember when I 1st got Vista and connected this HD to my vista based PC it gave an error and said the HD needed to be formatted and crap and I had to unnecessarily undergo a lot of problems and used a 3rd party software to retrieve/back up the data .. etc .. So am worried if I may face a similar situation again? Thanks in advance.