True, but just the act of forcing yourself to come up with 10 new ideas, seems like something that could be valuable. In fact, that's probably the most useful part of this article.
I might just give it a try, to see how it goes. I'll start a list of ideas, and try to add 10 new (unique) ones to it every day. I'm guessing after about day 2, it'll be hard to come up with 10 new unique ideas, that aren't just ridiculous.
By day 3, it'll probably look like:
1) Start a service to let people launch the remains of their deceased pets into orbit.
2) an Android app that makes Farting noises (probably already exists)
3) a YCombinator clone
4) Something that combines the best elements of Slashdot, XKCD, 4chan, and Ebay.
5) An AS/400 compatible RPG environment, to let businesses move off of (expensive) iSeries hardware and onto commodity Linux boxes without expensive porting costs.
2. internet forum designed for convenient arguing. Looking different from traditional boards. There would be one huge (potentialy infinite) 2d plane, and people can place their opinions somewhere in a rectangle, others can place their counterarguments nearby and connect it with arrows, there are other kinds of relations like "supports", "contradicts", "example of", "counterexample", "implies", etc. People can only vote on arrows, not on nodes.