I initially posted this in derk's "My Fellow Boardgamegeeks!" uberthread, but decided that it was too cluttered there. Haven't seen anyone suggest this before and I think it's simple and workable =)
Display current Geekgold on the home page. It can be right under the new mail/new subscriptions tab at the top. I was just buying microbadges yesterday and it got tedious having to go keep going back to my profile page to see how much geekgold I had left.