Bill Jelen, Excel MVP and MrExcel, has been using spreadsheets since 1985, and he launched the MrExcel.com website in 1998. His team provides custom Excel applications to clients around the world. You can see Bill as a regular guest on Call for Help with Leo Laporte in Australia, in Canada, and on Google Video. Bill produces a daily video podcast about Excel. He also enjoys taking his show on the road, doing a one- to four-hour power Excel seminar anywhere that a room full of accountants or Excellers will show up.