Every time Google releases a new feature for Gmail, Calendar, Google Docs etc. people who use Google Apps are left wondering whether they'll get the new feature. Sometimes they have to guess addresses, like for the new mobile Google Talk. They are supposed to figure out that the Google Apps version of: http://talkgadget.google.com/talkgadget/m is http://hostedtalkgadget.google.com/a/YOURDOMAIN.COM/talkgadget/m.
Besides having to deal with delayed updates and mysterious addresses, Google Apps users usually have at least one standard Google account and it's difficult to switch between the two parallel worlds. I noticed that when you go to Google Sites and you're logged using both a Google account and a Google Apps account, you are asked to choose one of them:
Maybe Google could somehow integrate Google accounts with Google Apps accounts so you can access all the services and get all the new features. The services that are part of Google Apps should have a customized interface and functionality, while the other services should only interact with them so you can, for example, share Google Reader items with your Google Talk contacts.