Instead of one, here's a couple <g> to check out ..
(List is in no particular order and
certainly *not* exhaustive .. )

David McRitchie's .. :
http://www.mvps.org/dmcritchie/excel/excel.htm#tutorials
http://www.mvps.org/dmcritchie/excel/excel.htm#vbtutorials

Debra Dalgleish's:
http://www.contextures.com/tiptech.html

Chip Pearson's:
http://www.cpearson.com/excel/topic.htm

J.E. McGimpsey's:
http://www.mcgimpsey.com/excel/index.html

John Walkenbach's:
http://j-walk.com/ss/excel/index.htm

Tushar Mehta's:
http://www.tushar-mehta.com/

Jon Peltier's:
http://www.geocities.com/jonpeltier/

Bob Phillip's:
http://www.xldynamic.com/source/xld.UsingMenu.html

Dave Hawley's:
http://www.ozgrid.com/

Stephen Bullen's:
http://www.oaltd.co.uk/Excel/Default.htm

Earl Kiosterud's:
http://www.smokeylake.com/excel/index.htm

Andy Pope's:
http://www.andypope.info/index.htm

Alan Barasch's:
http://www.barasch.com/excel/

Ed Ferrero's:
http://edferrero.m6.net/tutorials.html

Ron de Bruin's [Google search Add-In]:
http://www.rondebruin.nl/Google.htm

And .. don't forget to set aside some time in-between going
through the above for these wunderbar excel newsgroups !!

Mahesh

Couple more basic tutorials.

http://www.usd.edu/trio/tut/excel/index.html

http://www.baycongroup.com/el0.htm

Microsoft Training Courses.

http://office.microsoft.com/en-us/training/CR061831141033.aspx

Gord Dibben Excel MVP