Snippets Distributor for Xcode now supports Xcode 5 Developer Preview. All you need to do is to update Distributor for Xcode or install it if you haven't yet. To do that open Distributors window by pressing Cmd+Shift+D (or from menu Window->Distributors) and click "Update" or "Install" respectively near the Xcode in listing.
If you are not familiar with Snippets Distributors yet, it is plugin for Snippets that syncs code snippets from its library with the target app's (app that distributor is written for) library, so, these snippets are available for reuse natively in this app.
Here is a quick demo of the Distributor for Xcode: