I got this from www.angrycoder.com, thought it was funny enough to put here...

Top 10 Excuses For Why Your Project Has Slipped

10. It took a couple of weeks to get the Feng Shui just right in the user interface.
09. We found an Atari Emulator for Linux and decided to re-write Centipede in C++.
08. The documentation needed to be translated from Japanese to German to English.
07. The QA team camped out for 3 weeks to get tickets to the new Star Wars movie.
06. We would have shipped sooner but management made us write a spec.
05. They released the complete Dr. Who series on DVD.
04. It turns out that Chinese really is a different language from Japanese.
03. We decided to use Java and had to write our own class library. And database. And debugger.
02. It took two weeks to reclassify all the bugs as features.
01. The cleaning crew erased the whiteboard with all of our UML diagrams on it.

and...

11 We were hosting our SourceSafe Server on a Windows 98 Machine.
12 Our assumptions were correct at the time we made them, but things have changed
13 We started to work half days. (Worked 10 hrs not 20)
14 Our dev server's disk crashed, where all our backups are stored.
15 Because the project deadlines just didn't feel right.
16. "Oh, I didn't relaise that look and feel is more important that content and functionality. My bad."
17. The Project Manager keeps adding free modifications to the project.
18. Our only expert in [insert technology here] got laid off, ran out of time on his visa and is back in [India/Canada]


and my personal favorite....

19. The 60-day trial of Visual Studio.Net ran out.