links for 2008-05-31

• Good Experience: The top 8 mistakes in usability (and companies investing in it)
  Small liist of usability mistakes. I like point 2, which in my experience is the same as going the (wrong) persona route. Potentially, personas are a self-fulfilling prophecy: designing for a persona and then testing by pretending to be the persona.
  (tags: usability design interaction experience personas)
• Twitter-proxy: Any Interest? (Assetbar)
  Never thought about the scaling problems of Twitter in such detail, but indeed, this is a challenging problem. Looking at the profile of the mentioned example ‘twitters’ they even have more followers…Of course, twitter now has $15M to worry about it…
  (tags: twitter architecture databases scalability performance)