I too have taken to using my Ay-Ups in 'see me' flashing mode up until the hours of darkness. I have noticed that vehicles emerging from side roads appear to be more 'aware' of my presence, however, I still don't trust any of them. Even had a bus driver wait until I had passed him, normally they just pull out. First time for everything I suppose.
On the back I now have a Smart R2, an upgrade from an R1, which I use in flashing mode and 2 standard 5 LED on steady.
I had a driver pull up along side me late yesterday afternoon (dusk) at a set of traffic lights and shout in my direction that my lights were illegal because he could not get close to my back wheel to overtake because the R2 hurt his eyes.
My reply 'Good, you should never be that close in the first place.'
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]View: http://www.youtube.com/watch?v=lF-PytIrF_8[/media]