I'm the luckiest girl in the world and my sweet mom went and bought me some maternity clothes at a consignment shop when she went out of town. She got me some super-cute tops that are appropriate for work, two comfy dresses that don't look like tents and a pair of overalls that are HUGE but might work in my 8th month.
Really, the only thing I feel like I need is like two pairs of pants and I'm ready to go. I'll probably go to Old Navy or something when I get bigger. For now, the rubber-band trick is working just fine
Also, the group of homebirthers around here get together once a month and we all swap maternity and baby clothes, so that is a great resource!