Using Zotero and very fond of it – and since FF 3.6 is nippier than previous versions on the Mac this is even more pleasant. I’m drafting in Scrivener and using Zotero’s RTF-Scan function. The workflow: (a) Writing in Scrivener; citations, if I know them off-hand, are typed in in squirley brackets {James, 1890} or else fished out of Zotero via the quick-copy feature and a defined style. After my text stands I’m (b) exporting the draft as an rtf-file and © run Zotero’s rtf-scan feature on the text. There is generally a bit of ‘resolving’ to do (d, e - y) 
The result – including the bibliography generated by Zotero – goes either into NeoOffice, where I then have a text with citations and complete bibliography all from my Zotero library (though the interop via Zotero’s NeoOffice plugin doesn’t work with RTF-scan inserted items); or to Mellel (no plugin) where the citations and bibliography are in text (likewise not live) for finer typography. The RTF–Scan feature in Zotero could (and hopefully will) be more refined but overall the process has been quite workable – sticking to the conventions while typing the citations in Scrivener is crucial otherwise they will not be recognized in the scan. Zotero, besides doing bibliography, has also become an indispensable research-tool for anything web related; it does a lot more stuff which I don’t use.
Best, kithairon