1. Youtube
1.1. pros
1.1.1. nice inspiration
1.1.2. good way to visualise / communicate your ideas
1.2. cons
1.2.1. hard to get feedback
1.2.2. video is one of a million
2. Delicious
2.1. pros
2.1.1. nice way to gather information
2.1.2. through tags you need to refine your interests
2.1.3. nice way to benefit of other people interests
2.2. cons
2.2.1. not too creative
2.2.2. no visuals allowed
3. mindmeister
3.1. pros
3.1.1. nice way to structure creativity
3.1.2. good way to structure information
3.2. cons
3.2.1. no pictures / videos allowed
3.2.2. not much feedback
4. wikipedia
4.1. pros
4.1.1. easy to surf thanks to good structure
4.1.2. good starting point
4.1.3. great information source
4.2. cons
4.2.1. more complex infrastructure
4.2.2. quality standards limit creativity
4.2.3. references are necessary
5. Twitter
5.1. pros
5.1.1. strong network effect
5.1.2. good overview of ideas
5.1.3. continuos input of diverse people
5.1.4. strong autonomy of user in regards to tag decision
5.1.5. you need to be really specific
5.2. cons
5.2.1. no real exchange possible
5.2.2. no categorisation of ideas
5.2.3. really limited way to express complex ideas
6. Facebook
6.1. pros
6.1.1. it might be helpful in the long run
6.2. cons
6.2.1. its not about creativity , its about relationships
6.2.2. it is much more complex
7. flickr
7.1. pros
7.1.1. nice way to publish ideas
7.1.2. groups can help you to discuss ideas
7.1.3. combination of comments / pictures and videos
7.2. cons
7.2.1. you connect only with people you know
7.2.2. network effect not to strong