1. This can already be done. On the Spell Search page, there is a dropdown menu for "Source". All members have access to Live and Test, but Premium members have access to Beta.
2. We've discussed this. While it's possible, it would create a large resource usage load on page load (our Live, Test, and Beta databases are all seperate, so on page load it would have to do a comparison across all fields, across all databases). This might be something we add for Premium Members only (due to the resource usage), but I won't have time to code it until after this Beta.