Recommended by Roy on http://thisuser.com. Looks pretty cool.

Quoted: Mockups feels like you are drawing, but it's digital, so you can tweak and rearrange controls easily, and the end result is much cleaner. Teams can come up with a design and iterate over it in real-time in the course of a meeting.

redotting eric (http://bluedot.us/users/eric)

Quoted: In the last several years we’ve seen the rise and fall of many social web applications. While most of our attention gets paid to the hugely successful ones like YouTube and Facebook, we can also learn a lot from those that have failed. Here are some of the common pitfalls that lead to failure when building social web applications.

This is a reason why Microsoft Office and Windows will be around for awhile. Having said that, I don't think the following is a universal truth...it depends on the product and the market.

Quoted: So you convince yourself that you only need to implement 20% of the features, and you can still sell 80% as many copies.
...
“Unfortunately, it's never the same 20%. Everybody uses a different set of features. In the last 10 years I have probably heard of dozens of companies who, determined not to learn from each other, tried to release ‘lite’ word processors that only implement 20% of the features. This story is as old as the PC. Most of the time, what happens is that they give their program to a journalist to review, and the journalist reviews it by writing their review using the new word processor, and then the journalist tries to find the ‘word count’ feature which they need because most journalists have precise word count requirements, and it's not there, because it’s in the ‘80% that nobody uses,’ and the journalist ends up writing a story that attempts to claim simultaneously that lite programs are good, bloat is bad, and I can’t use this damn thing ‘cause it won't count my words.”