hi John,
i have had loads of trouble with the it bands in both my legs. I have used patt straps and to be honest they made very little difference, i also used a foam roller, attended physio for 8 weeks, done nightly stretches in the ITB and glutes, took glucosamine, rested, iced, you name it i tried it!
I wont go into how i ended up with problems in both legs but long story short i think the foam roller did me more harm than good (thats not to say it wont work for you though)
In the end it turns out that my right leg is a little shorter than the left, I bought a pair of silicone heel inserts in a local running shop and inserted one only in my right shoe, i was able to go out and run 15 miles pain free that day. Since then i have read a few articles that say ITBS can be caused by a number of things but one article said that in 70% of cases a shop bought orthotic will sort it out.
I recommend you get a friend to look at you from behind with your arms by your side, if one shoulder is slightly lower than the other then the leg on that side is short. You could mess around with a host of remedies but this is quick, cheap and could work for you almost immediately as it did for me.
p.s four weeks after sorting out the problem, in my first 10k race since the injury, i took 2 mins off my pb so the little insert was well worth £10!