Wonder Woman has been the focus of two made-for-TV movies.
The first was made in 1974 and featured the very blonde Kathy Lee Crosby as the Amazon in a completely different outfit from the comic book version. (That version of Wonder Woman appeared in a single panel during the course of the awful "Infinite Crisis" comic book series.) The villain of the telepic was Ricardo Montalban playing an evil businessman.
Ummm, yeah......!
I've seen this film and can testify on how awful it is!
The second Wonder Woman movie (1975) was the pilot for the popular TV series starring THE definitive live-action Amazon, Lynda Carter.
Although the Carter TV series has aged badly, Carter's earnest portrayal of the character and physicality (I'm being polite -- I know too many parents and kids read this board!

) have made it all but impossible to find someone to replace her in the public mind as Wonder Woman. She was just made for the role. Same as Christopher Reeve was the perfect Superman for his time and remains the standard by which all other Men of Steel are judged.
As for animation, it is true that Wonder Woman has not had a solo project... till now.
There's actual final animation clips up in the first official teaser trailer here
http://movies.yahoo.com/movie/1810036252/video/9069426
It actually looks pretty good for a direct-to-video project. Different design that Timm's, but still very Wonder Woman.
Keri Russell, I suspect, will surprise people with her vocalizations. In a good way. It's hard to be feminine and a warrior but she might have done it. That's what I found lacking about the Lawless' performance in
The New Frontier -- she just wasn't a very feminine Wonder Woman.