Excellent nice work man.  Yea as for sms I would deffinetly charge a fee or require a certain donation ammount much like btc guild.  The costs of the sms might not be much but they deffinetly add up over time.   Email notification might be something easier to implement as its just a sendmail command which could also charge a fee or donation for, and as many people have smart phones now a days it should suffice as well.   But anyhow no need to worry about that.  Great job on the stats and everything man.  I think it deffinetly bring more transparency to the pool which is what miners like/want.  At least I do.