For some months now I'm trying a new service called "Passpack" which is basically an online password manager especially suited for people which travel a lot or work on different computers. Having tested the service for quite a while now, it seems to be quite trustworthy, although storing your sensitive data on a 3rd-party provider on the web is sometimes a bit scaring.
You can sign-in using different providers, either with your Passpack-ID, Open-ID, Google or Windows Live Account...
to get your passwords however you have to input your packing-key...
So there seems to be a lot of security behind.
From a usability and user-friendlyness point of view, Passpack is great. The team has chosen to implement a fully client-side application by using Ajax to send and retrieve data. I personally like those applications most because they actually give you the feeling of using a local application instead of a traditional web-app which refreshes after each user action.
Passpack can be tried out here! There exists a free and pro-version of Passpack. I think the main difference is that on the free version you have a limitation of about 100 passwords (but come on, if you come to this limit you should maybe rethink your password policy :) ).
btw: Passpack has been developed by Passpack Srl which is an italian company! so I had to do some advertisment ;)