LCS 2007
My understanding of LCS 2007 is that it will be an IP PBX. So for now we dont see any added value for customers running both LCS and 3CX. That said it would make sense to wait with any judgement until the LCS product is released so we can see what its really about.
Apart from learning curve and resource requirements, pricing of LCS will be pretty steep too: The server with 5 clients will start at $1200 plus $31 for each additional CAL. Conversely, pricing for 3Cx will be a fraction of that.
In regards to exchange 2007 integration: The API to integrate with Exchange 2007 is open, and 3CX can achieve the same exchange integration that LCS 2007 can. We plan to integrate completely with Exchange 2007, allowing you to use the voice mail and auto attendant features of Exchange 2007.
Bear in mind that Exchange 2007 Unified Messaging requires a separate server install and additional licensing. If all you need is voice mail delivered to your inbox, you can do that with 3CX phonesystem already at no extra cost and without the need for an extra UM server. Voice mail will be attached to an email with the message details.
In regards to the Office communicator - its not clear whether this will be a proper, open SIP client or whether it will be just another proprietary Microsoft client. If its a SIP client we will of course support using it as a client.
In general our plan is to integrate with any product that adds value and has an open interface.