That being said, Postgres is awesome, I swear by by it, and it’s my first choice for projects where Oracle isn’t required or is to deployed on x86, I highly recommend it to anyone, especially EnterpriseDB’s professional offering with all the Oracle-compatability doodads (we use EDB Postgres installations as slaves to replicate our Oracle databases to, and our sprocs won’t break with this package).

The learning curve is relatively steep, but eventually you’ll begin to wonder how you ever got along with MySQL. The maturity and robustness of the ACID, MVCC and SPROC implementations, amongst others, is in the same tier as Oracle, MS and IBM offerings. Not to mention it lacks the limitations to vertical scalability that MySQL has.