After Tuesday's post, a few readers emailed me to say that the Solicitor General's website is a good source of writing samples. Begin your review here. You'll see there is a way to view the briefs by subject matter, which will help you to avoid those briefs that are too dry for your own personal taste.
If you want to see great legal writing, just go to the U.S. Solicitor General's website and start reading. It doesn't get much better than Seth Waxman, Ken Starr, and Ted Olson. It's fun to read their briefs, as they all have unique writing styles. I also suggest reading anything by Miguel Estrada, formerly with OSG and now a partner at a large law firm. When I had unfetted Westlaw access in law school, I'd go to CTA-BRIEFS or SCT-BRIEFS and read everything by Estrada. Also, go to appellate.net and read some of the briefs by partners at Mayer. Whenever I'm writing a brief in an unfamiliar jurisdiction and want to get a "feel" for how things are done, I see whether the lawyers at Mayer filed in a brief in that jurisdiction.