Hi.
I've used Multimedia Fusion from Clickteam quite successfully in a language learning context and it's about the same price for a site licence (£999) as Mediator. Tried Authorware but found it quite confusing. MMF has a good collection of in-built objects and quite a few contributed ones from community members. It comes from a game programming background but that's no bad thing as it performs quite well.
Product = http://www.clickteam.com/eng/mmf2.php
Costs = http://www.clickteam.co.uk/acatalog/Educational_Licenses.html
Good luck.
Allan.
