I was searching for Siacoin public mining pools but seems there are none...

then I read this arcticle http://cryptomining-blog.com/tag/siacoin-miner/

and it looks like setting mining pools for Siacoin is not really that attractive to operate...

However there is a PPS Siacoin mining pool in the works, but I dont think its online yet

see - http://forum.sia.tech/topic/252/pps-pool-in-beta-testing