Overclocking is easy enough with v3 firmware on bitmaintech website. The v3 has a pull down menu for speeds. There is an s3 support page somewhere around here and someone will know whats going on if you don't.
Installed the latest FW on my used b1 and shortly after noticed the fans were louder than usual. Checked status and found it hashing at 500GH/s -- yikes! Found the clock menu and it provides no options between stock and 500GH/s, so am back to 441 GH/s and reading through the support thread!
It is a difficult decision as the S3 is nice being so power efficient and easy to use and deploy.
I know I cannot decide either.

A reputable Bitmain Antminer dealer is offering $380 shipped for a current version S3, is there any reason whatsoever why I should consider waiting for an S3+ (regardless of dealer?) What is the advantage?
S3+ is cheaper with 10 extra hashing and opertuninistic 500 gh overclock. Bitmaintech is charging in bitcoin so unless on the 20th they ask for the difference bitcoin is cheaper right now.
I made the mistake of asking family members and I'll probably end up with paper stock instead of an s3+ so grab that offer before I do..
Bah! Current S3 is actually $390 shipped! Decisions, decisions!

Finally decided to pick up an S3+ for a total of two, but am considering another S3 as well -- just isn't a whole lot of difference between them and arrives much sooner.