I really like the pool interface of this site however there is room for major improvement if you have multiple pools to login to. I'll draw a comparison to officepools.com. All pools that you login to are stored as links that you can just click after that first login. I shouldn't have to login to one, view the pool, logout, type a different pool's login information, repeat process for however many pools you're in.
Most browsers (firefox for example,) allow you store such information within the browser. Since your pool is not likely at the top of your "passwords the wife can't know" list, you could easily have it auto-store the login information where you simply click the "Username:" field, and select which account to login to.
It will auto-fill the username and password for you, upon clicking.