Maybe a nice feature to add which might improve the usability of the client. It involves adding slicing and dicing on your list like on the website:
show/hide:
incomplete
complete
viewed
fileinfo
additional:
wishlist
notifylist
Additional to the fields displayed:
"Title, EPs, Seen, Rating, Reviews, Action"
the fields: "On wishlist, On Notify"
In fact, it would be the merger of the notify, wishlist and regular list.
On top of this, the notify list can be made local, so that after hitting the 'update' button you can review locally the looked for entries. (add up2date function to client)