In case you missed it, Microsoft rolled out a preview version of Skype for Outlook.com, couple of days ago. You can now make calls directly from your inbox with the help of a browser plugin, available for Internet Explorer, Chrome and Firefox. Existing accounts on Skype will have to link them to the website, allowing your contacts to be merged. This feature is currently available in the United Kingdom and will soon be made available in the United States and Germany in a couple of weeks. See the demo embeddded below, or hit the source link for more information.
Source: Skype Blog