I posted this a year ago but nobody replied. I now have a Q10 so can answer my own question. The phone does sync tasks and notes over the cloud, as well as calender, emails and contacts. This is a great feature I didn't have with the older Blackberry Curve. The sync works very well. The only problem is Remember which is the BB app to view, edit and add notes and tasks is not very user freindly and seems to have some bugs on my phone.
I therefore only use it to add actions for work related tasks I need to input from the phone. I have also migrated all my Outlook notes to Evernote which works very well on the phone.
I am using Ultimate Task Manager which syncs with Toodledo for personal actions not related to work.
Love the phone, just wish Remember was better or a third party app was. I used Next Action which is a pale shadow of its version from the Blackberry 7OS on the Curve. Even worse than Remember. Other apps have also been equally bad.
I could get Toodledo to sync with Outlook (paying a monthly fee) and then access work actions via Ultimate Task Manager but so far I am actually enjoying work and social being separate (were on the same task manager for many years). There is no need for this at present.