Writing a great business plan is a lot of work, but there are some great resources on the web.  Here is a collection of what I have found.

• Sequoia Capital - Writing a Business Plan
• Guy Kawasaki - The 10/20/30 Rule of Powerpoint
• Guy Kawasaki - I Will Fix My Pitch
• David Rose - 10 Things to Know Before Pitching a VC (video) - thanks to Darren Hoffman
• Andrew Ballard - Plan A: How to write a good business plan
• Andrew Smith - Writing A Business Plan - avoid this frustrating mistake
• Stephen Kreutzer - Writing A Good Business Plan: Outline of a Business plan
• Seth Godin - Really Bad Powerpoint
• Jeremy V. Smith - A Discussion of Business Plans
• Sara Scott - Writing A Business Plan - SatNav for Small Businesses
• Christian Mayaud - MYTH: "A Good Business Plan must Convince Investors"
• Dave Taylor - The Importance Of Writing A Good Business A Business Plan
• Alan Gleeson - Delivering a Winning Business Plan Pitch / Tips to writing a Business Plan  / Using video to pitch your business plan
• Steven Fisher - The Zen Of Writing A Business Plan
• Susan Wu - Art of the Pitch: Avoiding Common Presentation Mistakes
• David Cowan - How To NOT Write A Business Plan
• Stu Phillips - The Pitch Deck / A Pitch Deck Does NOT Stand Alone
• Guy Kawasaki - How to Write a Business Plan: Ten Questions with Tim Berry
• Robert W. Price - Creating Your Powerpoint Slides For Investors / How to Prepare your Fast Pitch / How do I get started writing a business plan?
• Anne Zelenka - Do You Need to Write a Business Plan? 
• Tom Eckman - Power Planning Made Simple
• Presmaster - Venture Capital Slide Show Presentation
• John Furgurson - Pitching to VC’s… Gone in 60 seconds
• Seth Levine - Putting together a good venture presentation
• Jay Maharjan - Ten Critical Steps To Writing A Business Plan
• Dan Schawbel - Life is One Big Pitch So You Better Start Practicing It
• Nicole Simon - How To Prepare For A Pitch With A Sparring Partner
• Arey Abhishek - Business plan presentation and pitching
• Scott Abel & Justin James - The Business Plan
• Wil Schroter - How to improve your pitch process with entrepreneurs
• Ben Yoskovitz - 5 Lessons Learned From Pitching VCs 
• John Gillespie-Brown - Statements to AVOID When Writing Your Business Plan - Gerry Lemberg
• K. Stone (via Dumb Little Man) - How to Craft a Killer Elevator Pitch
• Alison Stein Wellner (via Inc.com) - You know what your company does. Can you explain it in 30 seconds?