Part of course:
Project: Improve Wikipedia's Visual Design
Being run by a non-profit and 100% dependent on donations, Wikipedia is always constrained for resources — not just in terms of hiring visual designers, but also how heavy the page can be — serving large pages costs more money. But, for a bit, let's assume that Wikipedia is not constrained monetarily and can go wild on hiring the best UI Designers (so they hired you!) and giving them full freedom to improve the visual design however they want.