Administration printable order vouchers

I'm starting to work on printable vouchers option from the customer order page on the administration part next week.
Since this is a MUST for own administration and putting it in the boxes shipped to customers.

I'm still looking at the options:
Generate a pdf file that can be saved or printed
Or and use the crystal-reports runtime (since my company has a license for crystal-reports)

I want to know if there is something like this in the work already before I start on it.

nopCommerce team have several related work items. But we havn't started yet.

I have started on this today, I added a 'Print order' tab on the in orderdetail.aspx page in the Sales > order menu.
Hope to deliver a basic version early next week.