invision / sigma chat

i have been a happy invision customer for 2+ years and just heard of punbb. i really like the clean-ness of it!

i see there's a conversion script from invision to pun, but i wonder if the database can be integrated to share membership with invision chat (aka sigma chat) the way the invision forum does.

if it is not currently possible, is there a possibility of getting it to? if not as a standard forum feature, as a custom script that someone would be willing to get paid to write?