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I'm not really fishing for startup ideas, but I'd like to get a sense of consumer pain points that are severe enough that people will pay moderate sums of money for.

Good Examples:

File sharing / hosting / management: Github, Dropbox, Flickr

Dating / Networking / Communication: Skype, LinkedIn, Match.com, OKCupid

Tasks / Todo / Personal Search: Evernote, Basecamp

Others: Eyefi, Wakemate

Basically I'd love to hear answers that are like "Oh, I'd LOVE IT if someone fixes X --I'd totally pay 5 bucks for it!"

Every week, I see a post or two about Reddit not being able to keep up with the growth due to lack of hardware.

Google AppEngine seems to have all the features they need, is cost effective, and is built for this kind of scaling. So why not use it?