Version 3.0 brought a streamlined search mode, where the search function is now built into the main screen. This is a bit simpler and, I hope, more aesthetic than having Search stuck on it's own blank page.
The Search icon is still on the main screen, but it is in fact redundant now! To get the search bar, you can also give a downward pull on the main screen icons. Search will drop down into place.
As a result, you can delete the Search icon if you like. The Search icon might be removed in a future version, but I wanted to leave it there for now at least, until everyone is familiar with the pull-to-search gesture.