Lately I've been pondering the usefulness of shamanistic rage, so after some time and a little bit of poking around in Excel, I've come up with a simple spreadsheet showing the effectiveness of shamanistic rage.
The spreadsheet takes weapon speed into account, but has yet to account for windfury. It has a breakdown of the possibilities the skill can involve including different procs per minute, and straight percentages such as 5%, 10%, 50%, etc.
I'm pretty sure it's working correctly cuz the ppm stays static when I change weapon speeds while the %'s differ. The sheet currently uses the newest version of SR which is 15% of total AP for 30 seconds, and the mana gained back is broken down into MP5. Also, there is a column that calculates Judgement of Wisdom and Black Grasp of the Destroyer. So far, the skill looks a bit disappointing but go ahead and see for yourself.
To see the effects of different weapon speeds and attack powers, just change the value in the blue boxes. I take into account that the target is a boss with a 5% chance to dodge and you're dpsing from its behind. This might be a little off so if it is, feel free to give a comment and i'll make a quick edit. I also assume a few things such as 13% hit from talents and that you stormstrike as soon as its up, during the shamanistic rage duration.
http://d.turboupload.com/d/1010924/S..._Rage.xls.html
I'm not too familiar with file hosting so I just googled a random file host. If there is anything better, feel free to give me a few pointers.