You probably already know about Nextbus for real-time Portland Streetcar arrival information.

But do you know about MuniTime? For the iPhone?

The Portland Streetcar is one of the first two transit agencies available. To access it, bookmark this URL on your iPhone: http://pdx.munitime.com

(If the iPhone has such a great web browser, I’m not sure why you wouldn’t just use the Nextbus website, but the MuniTime interface does look pretty!)