This is a nice, compact site that shows people how imaginary God is:
[url=http://GodIsImaginary.com]http://GodIsImaginary.com [/url]
Here is the TOC from the home page:
It is easy to prove to yourself that God is imaginary. The evidence is all around you. Here are 29 simple proofs:
1. Try praying
2. Statistically analyze prayer
3. Watch the offering plate
4. Think about science
5. Read the Bible
6. Ponder God's plan
7. Understand religious delusion
8. Think about Near Death Experiences
9. Understand ambiguity
10. Look at historical gods
11. Notice that there is no scientific evidence
12. See the magic
13. Take a look at slavery
14. Examine Jesus' miracles
15. Examine Jesus' resurrection
16. Contemplate the contradictions
17. Think about Leprechauns
18. Imagine heaven
19. Notice that you ignore Jesus
20. Notice your church
21. Understand Jesus' core message
22. Count all the people God wants to murder
23. Listen to the Doxology
24. Ask why religion causes so many problems
25. Understand evolution and abiogenesis
26. Notice that the Bible's author is not "all-knowing"
27. Think about life after death
28. Notice how many gods you reject
29. Think about communion