New Fat-Busting Microwave Oven Unveiled  TOKYO (Reuters) - Eyeing up that juicy steak but worried  about your waistline? Japanese electronics maker Sharp Corp.  &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=6753.T qtype=sym infotype=info qcat=news"&gt;6753.T&lt;/A&gt; says it has developed a new fat-busting microwave oven  that can melt some of your worries away.