Multisite configuration?

Well I should correct myself, all subscriptions will not be for one newsletter, I just want one table to contain the subscriptions that come in from two sites. The newsletters will be seperate. So the subscriptions table needs to be shared. Is there any experience with this?

Well as a matter of fact I have it working: 1 database that is filled from two domains. I send the newsletters from each domain, but the group of people that receives it remains the same. I have shared the following tables: simplenews-newsletters, simplenews-subscriptions and simplenews snid-tid. I was told that I should also share the taxonomy table but I havent.
This works very well.

Thanks

TR

Sorry I must correct myself, I gave the wrong list of shared tables which may be confusing. Below is my real list of shared tables:

'users'
'sessions'
'role'
'authmap'
'sequences'
'profile_fields'
'profile_values'
'users_roles'
'simplenews_subscriptions'
'simplenews_snid_tid'
'bio'

It works allright apart from the fact that the users pictures are visible only in one domain due to the fact that each domain has its own file directory and the picture dir is below that. That is annoying but I do not know what to do about that. I am told Symlinks is a solution but I do not know how to make them.

Also I have the impression that domain 1 (which contains the shared tables) gives a rather high number of current visitors whereas domain 2 (which uses the shared tables) a rather low. If I look at the real number of reads this should be the other way around. I have the impression that now domain 1 gives the tot number of current visitors for both domains and domain 2 only the visitors for that domain (or not even that). I suppose this counter is session based, but I do not know really (and would like to!)