Yes but the problem as the person stated is that you can from the DropBox app open a document to Pages on iOS. But from Pages, you can't say save to DropBox. Thus, the link is broken and you have to deal with emailing etc. etc.
Yes you can there is an option to open the document in another app in Pages. I don't use the Dropbox app since I prefer PDF Expert, but my PDF Expert autosyncs with dropbox and it lets me send the files to pages. Then I can edit them in pages or any other app I choose. Once done I just send them back to PDF Expert and it syncs it up to Dropbox. No need for emailing.
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I do have Pages, but that's not really a solution. This seems a rather half-baked implementation on Apple's part. Isn't iCloud support supposed to enable your content on all your devices?
Yes but only for the features that work on the iOS versions. I agree iCloud needs some serious work. Hopefully OS X 10.9 gets it right. There has been very slow progress over the course of 10.7 and 10.8. What iCloud needs is:
All apps to be fully featured for both iOS and OS X, for all the iWork, iLife, iBooks/Preview, TextEdit, etc.
Better folder support, e.g. folders in folders in iCloud.
What would be best of all is if you could store you files in iCloud in folders that have various file types and each Apple app can see any of those files, opening the ones it is suited for. Their sandboxing shouldn't be app specific but file type specific (meaning you have to allow certain apps to open certain file types, but letting each app see what's store in the Cloud).