The service creates a new Smub as soon as you register for the free service. The tutorial Smub gives you the steps for creating Smubs.
smub.it/meryl/tutorial
The service provides a plug-in to create new Smub links. Its toolbar lets you enter your ID ("meryl" in the above example) and the personal keyword ("tutorial" in the example).
Smub also provides a bookmarklet for Firefox and Safari browsers, but it won't work on the iPhone or iPod Touch browsers since you can't drag the bookmarklet to your bookmarks. Instead, tap the URL of the page you want to Smub to put the cursor in front of the http: and type "smub.it/" and away you go. This takes you to the smub window for creating the new Smub where you can enter tags and comments, if you'd like. If you're not signed in, it'll ask you to sign in first.
Overall, Smub works well with the iPhone and iPod Touch. It takes less work to enter smub.it/ than to select and copy the URL, go to a URL shortening web site, paste the URL and then copy the new shorter URL to share. You can share Smub URLs from within your account by email or social networks including Facebook, MySpace, and twitter.
Smub keeps track of all your Smubs and makes them searchable. You can edit Smubs to add tags and comments long after creating the smub. Smub has much potential and it'll be interesting to see how the public receives new service.