I'm not trying to hawk Roboform but the U3 thing with it is really nice. My computer at work is on the Navy Marine Corps Intranet. It's actually the largest private Exchange network in the world. One of the things about large networks is that they are locked down like you wouldn't believe and make customizaton at the desktop by individuals nigh impossible.
Anyhow, I plugged my U3 drive in and Voila!, the Roboform toolbar popped right into Internet Explorer along with all my passwords. I would hazard a guess that I probably have more passwords than the average person.
Roboform is not a cut and paste thingy but fills in the password when it detects the form that you've saved. It protects this information with encryption and does not fill the password via the clipboard. Yes, the password is as secure as the Master Password and I believe in strong passwords.
While we're on the subject of passwords, I had actually given a brief "class" to some of the Admins and Mods a while back on the subject. A couple of the Admins whose names will remain anonymous had really easy passwords to guess. Let's just say that I was shocked at how easy they were given the nature of the Board.

They tore their garments when they learned this and they have truly repented of their wayward easy-Passwordism.
One of the things that really convinced me that I needed to amend my ways about a year ago was I had my Paypal account broken into and I lost about $100. It took me a while to figure out how the compromise had occurred but somebody had added a forwarding rule to my e-mail address in cPanel for one of my most used domains and recovered my password. The reason it was easy was not that I had an easy password but because I used the same password over and over in many different places. I obviously never do that any more. I keep a pretty standard password for forums and other stuff that I don't care get hacked (except this one) and even stronger for more important information.
I like Roboform because I can now generate long passwords with special characters that I can store and backup in an encrypted place. As a rule of thumb, passwords should be at least 8 characters long and include a number and a special character. It need not be hard to do either. There is something that is special to you and few, beside those who know you, would understand the password:
Clarkian$ could become C1ark!an$. It contains an uppercase letter, a number and two special characters. You could then use something like that to protect your passwords in your password manager.
BTW, I know Anthony and Jeff are both pretty savvy so I'm not trying to teach you guys on passwords but I'm throwing this info out to all the others who probably have easy passwords out there. If it's a dictionary word then Danger, Warning, Warning!