Hi Betsy - No, there is no change in the route.

As Walter says, Ostia Antica trains leave from Piramide station - reachable by metro Line 'B' from Termini/Colosseum.

Services are frequent - so you will be there in under an hour.

Hope this helps ...

Steve

Thanks, Steve. Seems like a neat day trip.

We've found this very helpful....

http://www.ostia-antica.org/touristguide.pdf

I did read of a price rise being planned for the bus/train tickets at the start of 2012, but for now they're still €1 - a bargain indeed?

Afterwards, you may have time to visit the medieval "borgo" and see the castle....

http://www.pbase.com/isolaverde/ostia_bracc

...and perhaps even for lunch at this place, which is just outside the walls?

http://www.ristorantemonumento.it/principale-eng.htm

Peter

We just got back (trip report forthcoming) and would like to point out that there are other options. We stayed near Piazza Navona so Metro Line B wasn't that convenient. Using the route planner on the ATAC site (http://www.atac.roma.it/?lingua=ENG) I realized that taking the #30 bus to CAVE ARDEATINE (which is on top of Porta S. Paolo (the departure point for the Roma/Lido train) worked better for us.

We found the public transportation very easy to use in general.

When you are in the area of Piramide station you might want to visit the Protestant Cemetery. It is a beautiful tranquil place and several famous people are buried there including Keats

Metro was 1 euro to ostia-antica.org it was a piece of cake

Just take the line out to the Lido and hop off at the right

"Ostiense" Stop if by train Ostiense station walkable..

eurocheapo.com/rome city tips free budget with a great map

I don't know the status of the trains now, but a week ago, we had to take a bus from somewhere on the train line because the train was not running all the way to Ostia Antica. We didn't figure this out until our train started going backwards! I don't know if this is still the case, it may be back up and running - there was a flood in Rome so perhaps that was the issue.

Hello Betsy, you probably read the SF Chron and saw this but just in case you didn't here is the website for the NonCatholic Cemetery in Rome. It is a lovely and relaxing place to visit.
http://www.cemeteryrome.it/

Thanks for all your suggestions. We're staying near Piazza Navona, so taking the #30 bus looks doable. We may check out Ristorante Monumento and the cemetery as well.