Yes there are archives of forum when it was in the older domain. But it's the same forum as it is used to be now but with less boards like when you see the oldest archive of the bitcoin.org/smf domain, there were only 2 boards present (Bitcoin Discussion and Technical Support) boards.

https://web.archive.org/web/20091215005450/http://bitcointalk.org/

If someone is not willing to visit the link posted above, here is a pic of that :



Another Interesting fact is gavin was the administrator and theymos was a global moderator at the time when satoshi left and there was a feature like posts per day near your total post count in your profile and something like Respect was present.





@theymos What is Respect BTW