Prezi can be a really useful marketing tool; every presentation you give can be a marketing opportunity, and you can also embed Prezis designed entirely for your website, giving you some instant dynamic content and your users something visually arresting to interact with.
If you've never used Prezi, start here (brief)
To see 10 top tips for making a GOOD Prezi, start here (brief)
The first guide I wrote about Prezi, for those who've already tried using it, is on thewikiman blog here.
To learn about using Prezi in the academic environment, start here (fairly in-depth)
This is a post I wrote for the LSE Impact Blog, specifically aimed at researchers and academics - but actually, as an overview, it's quite a neat introduction regardless of whether you're in the academic sector.
For a more visual guide, start here (more in-depth)
Here's a guide to Prezi which follows the 10 Top Tips format, but presented in easily digestible slides...
To see a complete guide to Prezi, made in Prezi itself - start here (properly indepth)
This is the Ultimate Guide, which takes you through what it is, why you'd use it, how it works, and how to get the best out of it:
The blog-post which goes with it is here.
To learn how to use Prezi to make interactive maps, start here (properly indepth)
Experienced Prezi users, start here for some nice features you may have missed (brief)
Here’s 6 useful things which even experienced Prezi users miss - check the comments of that one too, for more.
And finally, for experienced Prezi users who want something with a massive amount more depth and practical help, here's a link to the Mastering Prezi book for which I was a Technical Reviewer.
Phew! Any questions, leave them in a comment.