Zotero for Windows Mobile
What if you don't have your Notebook at hand but your PDA? Is there a Zotero-Data-Format handling application for PDA's (Windows Mobile) or do you plan to offer one? It would be fine to use Zotero-Data on the beach and everywhere.
You might want to think about what you most want to do on your PDA. Zotero basically does the following (rougly): website/document capture, metadata capture, metadata entry and reference, reports, organization/tagging/annotation of database items, and note taking. Since a full version of Zotero on platform like WM is very ambitious (though I honestly have no specific knowledge of the situation), it might be worth specifying which of Zotero's tasks you might like doing on a PDA, and trying work for a way to do them. Notes is an obvious first choice, and Zotero imports and exports to a few text-based (ie non-binary formats) including its own XML/RDF format. If you can get your text-based notes from your PDA into Zotero's RDF format, you could import them. Or you could use one of those copy-from-PDA apps to transfer text manually and paste it into zotero's notes.
You could take HTML notes on a WM HTML-authoring app, and import them like any web page, and you can create a Zotero report and copy that to your device --in HTML or plain text format, or (best) turn it into an eBook-type document (readable with, say, Haali Reader or Vade Mecum). Of course none of these are a the slick syncable note-and -biblio database app which you are probably thinking of, but if you have specific uses in mind, you may be able to make them work.
I have not heard any specific plans to create any such apps, but Zotero is designed to make that kind of thing possible for third parties, so you might be able to encourage (or pay) someone to produce that kind of thing for you.
Failing a full-on Zotero implementation though - could there be some sophisticated hooks into Zotero from third party mobile-only apps that could deliver biblio & notes painlessly to the main Zotero app on a routine sync, as Steffen describes? Or maybe an accessing of your Zotero synce'd 'cloud' data from any mobile browser? (So the heavy lifting is done at the Zotero storage/server end?) I'd be happy to pay a few dollars a month for the added security of cloud storage for my Zotero db anyway, and being able to run zotero, even remotely, from my phone would be a killer app for me. (I'm currently using dropbox for the same purpose.)Just a thought...
Since zotero depends on firefox, I would like to be able to run firefox on windows mobile. Then use zotero to quickly search publications by tags, browse the abstracts and incidentally view the entire pdf as well. Too often a paper is discussed and I would like to check some of it instantly. Now I use pubmed to search by year/author etc. and retrieve an abstract or check the paper at a later time. But with zotero I can search/select by (custom) tags and don't need to be online.
My thought are that as soon as firefox runs on windows mobile it might all be possible. Assuming that the firefox mobile version will support the zotero plugin.