I am also amazed by my AA-S1. The light output is not only extremely bright, it's also a beautiful buttery yellow warm color with a perfectly uniform, smooth beam with no transition, just a solid puddle of bright light.
The Tank007 E07 definitely appears to have an OSRAM. It receives very high reviews usually.
You might also look at the generic zoomable 1xAA and it's slightly classier cousin, the Sipik SK-58. I own them both, and they both have an OSRAM. Quite a deal for ~ $5.00 in my opinion.
The aaa light Black Cat HM-01 also uses an Osram Golden Dragon Plus(!). Also available as warm white at KD.
EDIT: Haha XRAYBoY, we've posted almost the same info. :)
IMHO considering the low price every flashaholic needs at least one of those Black Cats. They are virtually indestructable and have helped me numerous times, also makes a nice gift.
I have the c78 at focalprice, which is an OSRAM, but mine is a hideous shade of blue.
Someone here mentioned the ugly beam, which is somewhat true at flood, but in throw mode it's just the image of the bonding circuit around the OSRAM which I find kind of cool.
On the AA-S1: don't think, just buy. http://www.dealextreme.com/details.dx/sku.24220
I ordered at DX the AA-S1 on July (1st July). After 15 days waiting for supplier changed to "temporarily stock shortage". I asked them what was happening, and they told me:
"Hello,
Sorry for any inconvenicne.
Sorry to tell you that the item 24220is out of stock in our warehouse.
We are not sure when the item will be back to us.
Would you like to change it or cancel it?
Please advise so that we could help you with our best.
Thank you for your kind understanding.
Yours sincerely,xxxxxx"
PLEASE: if anybody orders it, and IS in stock now, please inform here, because I am crazy in to purchasing this AA-S1 which is for me the second best AA at DX