My UI ''sort've'' could be described as what you're looking for. Check it out at:
http://www.eqinterface.com/download...nfo.php?id=2330
It's not absolutely minimalist, but it does show a decent amount of information, and does have squared corners and crisp edges.
It's fully functional and updated, but I'm getting ready to release a newer version within a week, mostly due to optimizations.
Enok