Here is a photo of a new week view in the native iOS 5 calendar app. That app now features a scrolling landscape view of the users calendar, but the view changes depending on whether or not you are using an iPhone, iPod touch, or iPad.
According to Apple the following new features for the Calendar app will be available after iOS 5 is released:
Get more perspective on your schedule with year view on iPad and week view on iPhone and iPod touch. Tap to create an event and drag to adjust the time and duration. Add, rename, and delete calendars directly from your device. And view event attachments without leaving the Calendar app. iCloud lets you share calendars with friends and family, and it keeps your events in sync on all your devices.
Calendar app users on an iPhone or iPad touch will see a scrolling week view of their calendar while iPad users will be able to scroll through a year view of their calendar. The best part is that from within this new view you can tap to add a new event and later stretch it to cover the appropriate time slot after you’ve entered the title and location of the event. Tapping it after that allows you to edit the event just like you would any other added in one of the other views (i.e. set reminders, etc.).
Finally, iCloud will let you share your calendars with friends and family while syncing your events to all your devices..