It's a desolate picture! I signed up for a single 'cloud' Exchange account, which allows at least calendar, notes and contact sync between PC, Mac, iPhone and iPad. But the other issue is the horrible inconsistency of Outlook 2011 which has some great features but also has an array of bugs such as erratic format changes, mails 'stuck' in the outbox, absent options such as delayed send, format copy in mails etc.
I haven't even tried Mail on the back of consistent criticism for its minimalist approach.
Are there really any serious contenders to Outlook?