Some time ago, I created an online forum for people who were involved with writing units for SQA. The group is a public forum that anyone can join.
The e-group includes a wide range of useful resources for unit writers - such as the latest guide to unit writing [PDF] and information on core skills. The forum is not just for Computing teachers and lecturers - the resources are generic and can be used by anyone for any subject (and any level including NC and HN).
It's straight-forward to subscribe to the group. Simply send an e-mail or visit the group's home page.