The Australian Mathematical Society have produced a ranking:

http://www.austms.org.au/Rankings/0101_AustMS_final_ranked.html

It is widely used (for instance, by my own institution in the UK).

When choosing where to submit I also make use of the following ranking of journal prices/ value:

http://www.mathematik.uni-bielefeld.de/~rehmann/BIB/AMS/Price_per_Volume.html

Of course it's a different type of ranking, but you might argue that it's a lot less subjective!