1Password on iOS is the best way I've found to manage secure passwords, but the 4.0 version did not make it easy to search for passwords straight from Safari, iCab, or another browser (well, not Chrome, which doesn't support bookmarklets).
The recent 4.1 release added several bug-fixes and added two URL schemes:
Added support for ophttp:// and ophttps:// URLs. To open 1Password from Mobile Safari, simply type 'op' in front of the address.
Added support for onepassword://search/search_text to open 1Password and perform search.
Unfortunately, opening 1Password's browser from Safar
