The good news: It's been a long wait, but Tigana and and (2 of 3?) of the Fionavar Tapestry books were finally released for Kindle yesterday!
Tigana
The Wandering Fire
The Darkest Road
The bad news: The Summer Tree is still missing in action?
Also - holy moly, what is Penguin thinking?! $17 pricing for the Tigana ebook is utterly absurd - and from the preview, it doesn't even look like the "Anniversary" edition comes with any extra content at all. Amazing.