OK, you do understand :) My only criticism, then, is that the point should've been considerably amplified in the column. Most folks in the MySQL world don't seem to understand this point, so the more frequently it is emphasized the better. Overall, your column was very good.
ACS 4.0 is vastly different than ACS 3.x and previous versions, so before reviewing you might want to check in with us to see where we're at in our efforts to port the new version to PostgreSQL (and possibly InterBase, if the political machinations surrounding efforts to Open Source it come to an end). You'll also probably want to take a look at Ars Digita's project to build a Java version of ACS 4.0, since Tcl seems to be the major complaint some folks have about the ACS.
You should also give some thought to doing at least a short review of PG 7.1 when it comes out, as it is another vast step forward along the lines of 6.4 vs. 6.5 (when MVCC was implemented), or 6.5 to 7.0. Outer joins, sub-selects in the "from" clause, views that can contain "union" clauses etc, a function manager that handles NULL parameters correctly, and REDO logging for even greater data integrity head the list of features included in PG 7.1. It rocks! (I'm currently testing a pre-beta version).
