• IntelliJ IDEA site:http://www.jetbrains.com/idea/
• Download page: http://www.jetbrains.com/idea/download/
• Trial license page: http://www.jetbrains.com/forms/idea/download/evaluate5
• OS license page: http://www.jetbrains.com/idea/opensource/opensource.html

Community/support related:

• Support site: http://www.jetbrains.com/support/idea/
• Main IntelliJ Technology Network community: http://www.intellij.net/
• News groups: news.intellij.net

Flow:

• The C2 wiki (the original wiki): http://c2.com/cgi/wiki
• Some great info about 'flow': http://c2.com/cgi/wiki?MentalStateCalledFlow
• More focused: http://www.acm.org/ubiquity/views/v5i27_bederson.html
• How flow is related to IDEA: http://www.jetbrains.com/idea/whyidea1.html (page 2)

Various:

• An article related to the last question: http://www.eweek.com/article2/0,1895,1842333,00.asp
• Rick Ross' editorial about IDEs was in the Javalobby newsletter : http://www.javalobby.org/nl/archive/jlnews_20050830o.html