the University of Lancaster hosts (among other corpora) ItWaC and a 50% sample of UkWaC (registration is required but the service is free): http://cqpweb.lancs.ac.uk/
the Charles University in Prague also hosts DeWaC, FrWaC, ItWaC and UkWaC (here again registration is required but the service is free): http://korpus.cz/english/index.php
NB: when you download the corpora, you need to use your own tools to consult them. If you don't know what this means, then you probably don't want to download them and should use an online tools instead (see the secion “Free Web Interfaces” above).
if you are interested in downloading the corpora described here (for free, we're not selling them) please contact us
the semantically and syntactically annotated Italian Wikipedia is available for direct download from here: