Searching E-mail in Kiwi
In Kiwi, the plan is to have very extensive support for searching e-mail. I think archiving e-mail and search are the two areas that are really going to make Kiwi shine. First off, we are going to support two different kinds of searching: server side and local. IMAP allows server side searches where the server returns the results to you. This is particulary nice for searching the bodies of messages that you have yet to download, like for a mailing list. On top of that we are going to have a more powerful and flexible local search that searches your database of e-mail. This is one of the many reasons I decided to go with CoreData as the data store for Kiwi. Since CoreData sits right on top of SQLlite, Kiwi will have power of a relational database sitting underneath which will provide for complex queries.