pgAdmin 1.9 will have some nice new features. The query designer will probably save a few keystrokes when working with star schemas.
The MySQL Performance Blog explains the different meanings of COUNT. Very nice. I usually use COUNT(1) or COUNT(*), but it is very useful to know about other possibilities.
I got this one from a good friend:
Recently I realized that I waste my life on the internet ... and published this insight in a blog. :-)
PostgreSQL 8.4 is getting WITH queries. It looks very promising (increases readability and performance at the same time).
Why there isn't an is_number function in Perl. I also liked the function name looks_like_number :-).