I would value bitfinex the company anywhere from 198,000BTC ($117,728,820) up to 1,190,000BTC ($707,562,100)
so IMO a fair deal would be that all these BFX tokens put together represents shares equal to 10-60% of bitfinex inc.
very rough numbers.
Is the name of the new token BFX Omni? There's a reddit thread discussing the new setup and one post calls the tokens BFX Omni. I can't find anything else about them yet, but I only skimmed through most of the Bitfinex announcements and could have missed details about the tokens.
https://www.reddit.com/r/Bitcoin/comments/4wnfj6/bitfinex_is_back_up_functionality_disabled/