Search adds some of the most requested features to the iPhone:
1. Searching of contacts based on first name, last name, organisation, job title, department or notes.
2. Searching of calendar events based on summary, location, or notes. (Currently does not include some recurring events, and does not use the special calendar time zone support. All events are displayed relative to the main phone time zone setting)
3. Search allows you to dial up a date, and then jump straight to it in the iPhone Calendar application.

Changes:

– Added support for firmware version 1.1.3
– Calendar event results are now sorted starting from most recent
– Improved unicode support in calendar event info

http://www.polarbearfarm.com/installerabout.php