Peter Morville at Semantic Studios has compiled an extensive list of ways to create deliverables to communicate uX designs. He writes about this in User
The article contains a list of 20 techniques with links to further reading on each. To make it easier to find suitable techniques he also made a Treasure Map (pdf) so it’s easier to see what your options are. Or as Peter himself put it:
It’s hard to find the best trees when we can’t see the forest. So, we often fall back on old habits. We churn out wireframes when a story may be worth its weight in gold. Some great deliverables stay hidden in plain sight. That’s why we created this treasure map for our wall (and yours).
– Peter Morville