SA Updating

[Rense Buijen]

Hi Group,

Is there a way of updating spamassassin automatically to adapt to new 
ways of spamming.
For instance, when picture spam came I had to install fuzzOCR, now with 
PDF and RTF, new modules are required.
I also heard about rules-du-jour or something, do I always have to 
manually compile, add and install these things to spamassassin or is 
there a 3th party tool that can keep track off my SA install and update 
it every day or week?

Thanks!

Rens