I'll definitely miss iWork. I'm fine with iCloud for data backup and cross-device stuff, but that's not what I used iWork for. I used it for Sharing files so that I could have an email link for which they can view the document and also download it in a format they can read or use. A very nice way for getting the document out, which can be quickly updated on site, and others have the option to download it as a Word file, PDF, or whatever.
I'm just hoping as more of these previous things get axed, that they supply an equivalent for easy document sharing where there's a *one place* location for everybody to access the latest document. It's like that for the iDisk as well. I haven't seen an equivalent yet. Same thing for PhotoStream. It doesn't really give the gallery features which allowed you to internet share photo event groups and such.
Now true, you are going from paid to free, but now I'm starting to have to really wonder what various 3rd party plans I need to get in order to gain some of that functionality back.
Dropbox is fine, though it doesn't seem to have that cool aspect of allowing you to share files with a masked html address with auto-managed availability time limits you could set. While I don't mind manually moving files in and out of a public viewable location, I did like the masked address stuff. That added a level of security of what's in your file system from automated grabbers out there.
I'm going to try out Photo Journals. That might be at least some kind of limited event sharing thing that would be lost once the gallery goes.