[X4U] OpenLDAP

[M K]

I'm looking for a replacement for the Exchange public address book /  
contacts.

I think that OpenLDAP is the answer, but I was wondering what other  
people are doing.

Here's the gist of what we're doing:

We want to get rid of an Exchange server.

<applause>

What we need to replace:

1) email (that's the easy one)
2) calendar and tasks (iCal will do all that rather well I think)
3) publicly share a list of contacts
4) do all this on an iPhone


Are there any open projects in the works?

Is anyone using iPhone on an enterprise level yet with OSX server?