[syslog-ng]remote logging from syslog to syslog-ng

Hi everybody, I am new to this list and don't use syslog-ng yet, but it all sounds very promising - and I will switch immediately if syslog-ng can do the following: We have a couple (50 - 100) clients that use syslog. Some (but not all) could be switched to use syslog-ng (on OpenBSD 3.3). We want to set up a central logging server running syslog-ng. Here we want to create directories based on the remote-client's MAC address and also add the information to a Postgres database. I already saw that it is possible to log to the DB. However, most important is that the syslog-clients could report to the syslog-ng server. How would I do that, if possible? Thank you very much in advance, Joxn