personally, i normally use Google Calendar(through an iPad's app) and have my own written week plan(similar format with WeekPlan), therefore, it will be nice if i can access my WeekPlan from my Google Calendar
For me, I use Google Calendar for scheduling. There are a lot of features that this could incorporate, but for me...if I could just see my Google calendar on weekplan, it would be a great help. My purpose here would be to schedule my tasks around my appointments.
I would go for the "see WP tasks in Google calendar (or outlook)"
These calendars are widely used, very mature, multi-platform and incorporate native features (reminders, off-line mode, ...)
No need to re-invent the wheel...
Plus, the scenario of creating a task in Google Calendar and then viewing it in WP sounds wrong to me. It misses the point, IMHO, of creating a task in relation to your roles and vision.
It's really helpful if Workplan can be synchronize with Google Calender. Which i hope i can see all my Google Calendar appointment on Workplan, it will be even better if workplan have a mobile version.
I'd love to see my weekplan tasks in Google calendar. Have been looking for AGES for a 7 Habits-centric planner for Google cal. Google tasks is insufficient. Weekplan (just started using it today) looks like a worthy replacement.
However, the ability to schedule tasks from weekplan with an "Add to Google Calendar" button, or even better, access to WeekPlan from within Google Calendar would be excellent.