I'm liking the combined search's returning results where the search terms are in a different order than the one entered in the search box, as this is a recurring problem with names, which are written in different orders in different countries. (Some people write last names in all caps as a way of indicating which is which.) This could be extended to the results you get when you filter just by actor.
Also, the Birth Name field could be used to find matches when there are no results for the main name, as could an Alternate Names field like on IMDb, and it would cut down on the number of duplicate people entries.
One other thing you could add to the search results for actors is a label of which ones have IMDb links associated with them (although there's no actual IMDb link for actors on their pages, just a list of their movie/TV appearances), as these are the entries members should be entering new data into. On the search results page that's filtered by actors, there's the item count to give you a clue, but I don't know what that's based on. On this search http://www.listal.com/actors/search/qi%20shu
, for example, it says there's 1575 items for this actor, yet they've only been in 51 movies according to the item page. This search http://www.listal.com/actors/search/werbowy
shows 0 items, yet there is one movie listed on the person's page.