Mich Mathews, a former General Motors employee, has been with the company since 1989.  After working as a UK consultant for the company, she started full-time in 1993.  As she worked her way up through the ranks she was responsible for internal communications as well as advertising and public relations.  Currently, Mathews is responsible for over $1 billion of marketing for Windows, Bing and Xbox.

She will be helping Microsoft’s COO and CEO find her replacement.

In speaking to Ad Age, Mathews states that she made her decision over Christmas, and that she simply wants to break it up and start a new part of her life:

“Twenty-two years in one place … I feel like I’ve done so much” and “frankly it’s time to do something new. It’s half a lifetime. Microsoft was chapter one and it’s time for a chapter two.  It’s going to be awesome to actually get off the grid.”

She will definitely be taking a break for a while, and surveying her options.  “I am going to talk to a lot of people, return all those calls I’ve never returned, take the summer and dive into something probably around the fall time frame.”

When Yahoo was on a bit of a spending spree for social media-type startups, Delicious represented one of several companies on Yahoo’s shopping list. Delicious offers a social bookmarking service, where people can keep and share the links they find interesting.

The site’s continued development will happen without its founder, as Schachter intends to leave Yahoo. Several Yahoo executives left or plan on leaving Yahoo before their annual meeting takes place on August 1st.

TechCrunch learned from Schachter of his impending departure. “The development of the new version of delicious seems to have almost stalled within Yahoo, and Joshua cited recent frustrations with the process as playing a part in his resignation,” said TechCrunch.

Schachter has no current plans for other projects, unlike other high profile departures like Jeremy Zawodny and Vish Makhijani. Both men have new jobs awaiting them in their post-Yahoo lives.

Delicious continues on as well. The Delicious blog announced the release of its add-on for Internet Explorer. An add-on for Firefox has been available for quite a while, and this gives Delicious the potential to be a fixture on a lot more browsers than it is today.