"We realize that more people in the world have mobile phones than have computers, and people take their cell phones with them everywhere. Since one of our main goals on the Calendar team is to make planning your events and maintaining your schedule as easy as possible, starting today, you can access your Google Calendar account from your cell phone! Just visit calendar.google.com from your phone, and you'll see your agenda of upcoming events, complete with details like date, time, location, description, and guest list."
It is just a web page, but it is formatted to fit small screens and optimized for low bandwidth connections. This could be real useful if you synchronized your desktop calendar with Google.
I've seen people do the sync argument for Google Calendar before and I thought I'd add this to the discussion.
I see sync being important if you have a very active volatile schedule. But if your schedule is lighter, if your appointments change infrequently, and if you live in an area with good cellphone coverage, then a web based calendar really works well, even without syncing.
I have a decent web enabled phone and a non-connected Dell Axim x50 Pocket PC. Since getting the phone, I use the Pocket PC mainly as a media player and note taker, I have a handful of word and excel documents on it for reference as well. Also the bigger screen makes the Pocket PC more useful for checklists and todo slist management.
The Phone however has become my main PIM. Phone numbers are on there, short email are done there, news web surfing and yes: calendars.
I find I don't sync much anymore to work on something on two different devices, as much as I sync to have a backup.
Different people have different levels of syncing needs.
You have two solutions for syncing google calendar with your pda: gosync and oggsync. I am using the last one. You have limitations concerning exceptions in recurring appointments, but everything else works well and they are working with this issue.