Note: This post is over a year old and so the information contained here might be out of date. If you do spot something please leave a comment and we will endeavour to correct.
To get a random row from a PostgreSQL database you need to use the RANDOM() function. This is similar to the MySQL function RAND() and will generate a new random number for each row and order them by that new number. This is used in conjunction with the LIMIT clause to limit the amount of returned rows to one.
