i'm reading the manual right now (http://opalang.org/public/book_opa.pdf http://opalang.org/public/book_opa.pdf), it is a lengthy pdf that also features a wiki,

i'm reading the manual right now (http://opalang.org/public/book_opa.pdf http://opalang.org/public/book_opa.pdf), it is a lengthy pdf that also features a wiki, advanced chat, web service client and server and a reference of the language.