Workbooks already includes "update / overwrite", via the Import functionality - http://www.workbooks.com/help/running_an_import. This functionality addresses most "bulk action" requirements, but it does require you to export to CSV, update the CSV, and re-import. There are plans to add a simplified "bulk action" facility in the future.
Please feel free to add comments outlining the sort of bulk updates you'd like to perform.

Add a Calendar Style window which shows by day/week/month exactly what is going on, in similar way to google calendar, with ability to show only your activities, a specific user's activities, all activities, and filters.

I'd like to see a method for customers to login (using their own email/password) and be able to log new support cases, monitor cases already logged, and be able to update and close them if required.

Also the ability to upload attachments that may be related,

Enhancement request for a breadcrumb within Campaign reporting to link to people level.

I would like to have re occurring activities so that they can be scheduled like they are in outlook. A lot of our users would see this as a massive function as we are currently now using 3 systems. If we were to have this function we could do all re occurring activities in work books instead of outlook

To be able to synchronise Workbooks Activities, such as demonstrations/appointments/meetings in Google Calendar

The ability to create a custom field which is calculated from other fields. Such as currency multiplied by a certain rate, or two multipliers in line items to give the price.

It would be really useful and save time if there was a button or hotkey you could use to insert the current date & time into notes.
In Notepad, on a PC, F5 inserts "10:27 01/11/2010".
Can you add this please?

When I add a primary contact they autiomatically became a related item - that is a good feature.

But, if I change the primary contact for an activity the original primary contact is then removed as a related item when I click save, that is not a good feature!

An individual is still likely to be related to the activity and it should only ever be the users decision to decide to remove information as no longer being relevant/related to a particular activity.

By allowing completion and follow on of tasks synced with the Outlook Connector, one creates a mobile version of Workbooks using Push Email, without requiring a mobile app.

This also allows for offline working within Outlook

Automated email signature on replies and forwards - not just on new emails

When you have a list of objects, allow editing of values in the displayed columns. Especially tickboxes and dropdown fields. (I think this is already supported for line items on quotations)

We could improve the usability of cases by making it possible to 'publish' cases to a knowledge base view.

This would include adding a 'Knowledge Base' check-box onto a case. In addition creating a system view which displayed all cases in the 'knowledge base'

This is quick and easy to implement.

Also adding the resolution information onto the grid would improve things.

We have clients on a system similar to subscription. It would be great if we could be able to create recurring invoices so that we dont have to manually create invoices for each of them. So an option to recur the invoices on a weekly, daily, monthly basis etc.

Some of the products we buy have odd pricing, 27.5p per unit for example. When creating a line item it will automatically round this up to 28p, which in a deal with 2000 units effects the accuracy of margins/deal size etc. The work around is to just put in a line item and total cost but Id rather have unit costs for the sake of accuracy.

To save duplication it would be great if when you get assigned an organisation workbooks automatically links you to any opportunities for that organisation.

Also when you create an opportunity that it would automatically enter all people from the organisation and any other previous organisation notes.