OMG! How many did they have? And which Toys R Us did you see them at? Let me know which one you saw them at and I'm going to head down there after work!
I found the first commando wave of Sigma Six figures at the Toys R Us by Polo Park. I picked up all five which left only two figures (Heavy Duty and Duke). Hopefully they have more so they can restock.
I'm pretty much looking for new stuff (like Sigma 6 figs) currently. Legends Action Figures is an awesome site, but they're mostly sold out of their stock.