Recently I wanted to export some of my snippets from Textmate, so my teammates could use them too. I tried everything: right-clicking on snippets and bundles, clicking various buttons in Bundle editor, searching through menus and options, but I couldn’t any command for doing so. After several minutes of frantic clicking, I resorted to reading help file. To my surprise, exporting and importing bundle items is very simple, almost too simple.
If you want to share a bundle or particular bundle item then you can drag it directly from the bundle editor (from the list in the left side of the window) to the Finder.
This item can then be sent to other people and they will be able to double-click it to install it. Note: this also works for single items, like a snippet or a command.
Moral of the story: too much intuitiveness will kill you. Or: if you make something too simple, some people may overlook it. Maybe you should add a less intuitive option for them too (like right-click menu item).