Concerning opinion polls I don't know of anything more comprehensive than the wiki page.
Nationally the communists probably don't have a chance. As far as I know they never polled above 2% (4 being the treshhold). In Styria they are established as one of the two smaller parties and I don't see that changing any time soon. Wait this is important. Someone is wrong on the Internet.
D'oh. *Lunatic*, n. One whose delusions are out of fashion.
