Best New Tab Extension! Rated 5 out of 5 stars
By far the best new tab add-on I've come across, and I've tried at least five others.
I particularly like the ability to add multiple search widgets (amazingly handy!), syncing and customizable thumbnail sizes.
I hope the developer keeps things simple, and also updates this so that it'll work with Firefox 3.5. I've tried the Mozilla prototype that will be built into Firefox, but I very much prefer the features of Desktop.