I'd rather the initial animation slide up from the taskbar. and it would really be context sensitive if it could slightly buzz/vibrate/gain users attention in case it 'detects' that the user is stuck. what 'detects' actually is the context and could be configurable by the author based on wait time, scroll up-down, highlights of keywords etc. I can't think of a really fit example for this, but perhaps any web based application that requires specific input for relevant results such as mint.com?