I did a quick Google search to see if others felt like I do, and I only found one link in the top 100 that weren't just programming related: IanG on Tap: I Hate Dialog Boxes that Grab the Focus
I too hate how Windows (and certain window managers on Unix) lets dialog and application windows pop up and steal focus. Twice this week I've had windows pop up, presumably asking a question, and disappear as I am madly typing into whatever I'm currently doing (usually programming). My windows machine started to reboot on me because of this (that's what the dialog was for). EH?
Stop Stealing Focus!!!