New domain or not

[nakkijooseppi]

I have the quite popular <snip> website in Finnish. I'm planning to translate texts to English. Is it better to place new pages(in English) under that existing domain or a new domain (for SEO)?

[edited by: caveman at 6:49 pm (utc) on Jan. 3, 2009]
[edit reason] Removed specifics, per TOS. [/edit]

[canadafred]

For SEO purposes I'd go with creating a new domain (a dot com for the english version) although having both versions within the same domain can have some SEO advantages too.