Searching through the all ideas column has been at the top of our stormweight group rankings for a while. Now, with the power of jQuery, it was a fairly simple addition.
Try loading one of your lists and typing into the search box at the top of the all ideas column. As you type, only ideas containing the text that you type will remain in the list. If you delete the text, the ideas will show back up.
You can use the search feature to filter by categories too. Have a look at the categories as they are capitalized next to their check boxes, and make sure you enter the correct case into the search box.
Search is currently case sensitive, but we plan to fix that in the near future.