I went into my local microcenter and I purchased 2.5g of Arctic Silver Ceramique (really good price, $3.99). I would not dare reapply already have reapplied thermal paste on my brand new MBP (specs in sig), but I have an old (late 2007 model) white MacBook which was in desperate need of a reapplication. Before the reapplication of thermal paste, it would idle between 55-65ºC (131º-150ºF). While watching flash videos, it would hover around 91ºC (195ºF) After the reapplication of the thermal paste, it idles between 39º-53ºC (102º-128ºF). Now, it never goes over 71ºC (160ºF) while watching flash videos. If you can, I would recommend reapplying thermal paste. I would also recommend Arctic Silver Ceramique. I would also like to report how easy it was, if you follow ifixit's online guides on how to remove the heatsink and how to apply thermal paste. I have never done this before, and when following these guides, it was very easy. A good way to keep track of your screws from your MacBook is to take a piece of duct tape, and flip it over so that the sticky side is exposed. Put the screws on the duct tape, and you will find that they stay where you put them and it is easy to organize the screws. Note: I am not responsible for any damage done to your property resulting from this post/thread.