I'd love to migrate to postgresql. Unfortunately none of the published tools work well.
1) taps ( done by some people from Heroku ) : https://github.com/ricardochimal/taps and http://adam.heroku.com/past/2009/2/11/taps_for_easy_database...
2) mysql2psql : https://github.com/maxlapshin/mysql2postgres
3) Just slurping in the data via the FDW feature for 9.1 , http://www.pgxn.org/dist/mysql_fdw/1.0.0/
PHP blog generation software, or some lower level, more general purpose tool???
But on that note PgAdmin3 is pretty crap. At least on my mac.