If you need a convenient way of finding out what's impacting your commute every morning, get on Twitter and follow my new list, @plattypus1/ie-transportation
You'll get updates from both major IE transit agencies and Metrolink, along with RCTC and IE511 updates, and tweets from yours truly and the Transit Coalition's IE campaign. If you like (and have unlimited text messages on your cell plan- and really, who doesn't these days?), you can have these messages delivered directly to your phone via SMS, and it goes without saying that smartphone users can fetch them on their device of choice.
You're also encouraged to subscribe to the Riding in Riverside Google Calendar, in order to keep up with transit happenings around the area.