From: http://gigaom.com/2007/04/18/ebay-likely-buyer-for-stumbleupon/#more-8780
"By marrying the (StumbleUpon) toolbar to Skype client, eBay can do an end run around Googles dominance of the search business. A simple search box inside Skype client is all it would take. It is not that far fetched: Skype has been slowly integrating various different services (including PayPal) into its client, and slowly becoming eBays desktop backdoor."