Image: Brian Wolfe
I'll keep this one short and sweet, shall I?
Why don't you have a shot at making a unit of course material (and by 'unit' I mean anything that systematically works through a lesson of some sort -- say 2-10 pages of material?), and upload it onto your blog?
I would also encourage you to make it available in adaptable formats as well as PDF form (if possible) so that teachers can tweak it based on their own needs and contexts.
AND, try making an accompanying Teacher's Guide to accompany your material. You could explain the original contexts and targets associated with the material, bearing in mind that teachers in most other places would probably need to adapt and change it in various ways.
Why do this?
Consider it an Imagine thing...
As in, imagine if hundreds (or thousands, or tens of thousands) of teachers created and shared a small amount of course material each. Imagine it was reasonably well formatted and supported with teaching notes. Imagine it was distributed through the web 2.0 muscle of the blogosphere, where cross-linking, commenting and communication all come to the fore.
And don't restrict yourself to thinking of course materials the way commercial publishers do. There's a reason why so much doesn't end up getting published through those avenues. It's not just a case of your stuff not being good enough for them and their business model. It's also a case of them and their business model not being good enough for your stuff...
So go on, take a punt. Make some course materials and present them on your blog.
I call it a challenge, but it's more like an invitation.
And if you do, by all means leave a comment and link for me here on this post. I'd be happy to compile a series of later posts showcasing and linking to your work!