Yep, I love pwdhash. It's portable without worrying about leaving a password database on a thumbdrive or in the cloud, it can generate long, site-unique passwords while using the same base password. Pwdhash is pretty nice in that it is sensitive to stupid websites that don't allow special characters, too - if you put a special in the password you supply, it very likely (but not necessarily) include one in the password it generates. If you don't put specials in the user-supplied portion, the output is just alphanumeric. Of course, there are still the stupid websites that want passwords to be 12 characters or less, and/or have to start with a letter, and/or other asinine rules. A downside though is that there is a maximum length for the passwords pwdhash generates, 22 chars if I remember correctly, but at this point, I don't think that's really an issue.
Still don't recommend actually using the same base password for everything, of course.
The other cool thing about pwdhash (and potentially, similar services too) is that they don't have to be used on websites. You can use it to generate passwords for, say, your wireless. Do something like the SSID in place of the website, then supply your part of the password.
Pwdhash