Support for Lotus Notes mail (including archive) searches is fantastic. I think a huge number of corporate type users (like us) use Lotus Notes - and it can be a surprisingly overlooked market. Not everyone thinks that MS Exchange is the cat's meow.
Anyhow, I'd like to strongly suggest that X1 continue its strong support of Lotus Notes by adding support of related views that are stored in the mail file, ie:
Lotus Notes Calendar
Lotus Notes To Do
Thanks.. and X1 is great!