Here's a nice news. Sun has announced that'll ship and support PostgreSql with Solaris. This is probably a good thing, and I hope that means we'll see quality JDBC 4.0 drivers ahead of other db's. As both Java and .Net have generics now, I can't wait to see how they'll try to take advantage in their database middleware and these new language constructs.
I think that Pg will gain some better diagnostics thanks to DTrace but since I'm mostly a windows user, what I'd like to see is the addition of performance counters to the windows port (it's a really sweet feature of SQLServer).

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