Accelerators are IE add-ons -- new contextual menus that Web developers can write to allow IE users to more quickly interact with their sites. For example, highlighting a street address and choosing 'Map with Google Maps' takes you straight to that address in Google Maps -- no copying, no pasting.
Web Slices are currently less compelling, but we foresee a rosier future, with brighter hats and bigger balloons. They look like bookmarks on your favourites bar, but pop up a small 'slice' of content from your favourite sites, such as new blog posts -- essentially glorified RSS feeds that developers have to write especially to work with IE, we felt.
Ryan Servatius, Microsoft's senior product manager for IE 8, told us all kinds of content -- including Flash objects, JavaScript and advertising -- can be embedded in a Web Slice, however. A site could sell ads on Web Slices, for example, making them more compelling to develop.
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