I've been watching 1password for a while now, it sitting quite happily in my "to buy" list - I took the plunge a couple of hours ago and am delighted with the software both of the formats I've tried - the Windows and iOS clients.
I previously used something called KeePass, which seems to have had a strong influence on the creation of the 1Password Windows software - your team have done an excellent job making a much more modern, user friendly take on the password safe, and for that I applaud you! The iOS application (and integration via dropbox) is superb as well; I originally wasn't too sure how the software would go about 'injecting' the login data, but the integrated browser answered that question.
I think I'll be making use of the iOS client from now on in order to save notes - the automatic sync between desktop and iOS clients actually makes it far easier to synchronise my notes than using the built in "Notes" application, so bonus points there. That, and the fact that the client functions without a network connection is a nice touch as well, although obviously a given, since I'm synchronising using Dropbox.
I've a feature request: the ability to email notes from within the client. The automatic syncing means that getting the notes to my desktop and laptop is not a problem (I used to have to email them to myself), but I very frequently have to make lists of electrical parts and similar that I send to clients, via email.
I'm also a bit curious as to what happens if AgileBits goes under (perish the thought!) - the software seems fairly self-sufficient in regards to managing user data, but what about activation of the software to upgrade it from the trial to registered version? Should the worst happen, would any trial versions out in the wild automatically be given an indefinite trial period, or similar?
OK, now on to my comments regarding Multi-field Logins. I'm registered on a medical website
that requires me to enter 3 pieces of information in order to login; my Practice ID, my Access ID and my password. 1Password seems to see both the Practice ID and Access ID as a single username. I've already learnt how to customise the saved data for a Login (thank you so much, giving the user that level of control in software like this is a very big deal!) but I can't work out any way to tell 1Password how to handle multiple "username" fields, such as in the scenario mentioned above. Is this something the software is capable of handling? If not, could your team please consider adding support for it? This isn't the first government website I've came across that makes use of tri-part (or even quad, in the case of a few public-access military sites I've had to work with in the past) logins in this fashion!
Your team has done an exceptional job thus far, keep up the good work!