I had read that there are in the HP pipeline an HP 15c (limited edition) and Hp12c 30th anniversary and one additional product (maybe an HP50G color?). Anyone knows about this?

source: http://www.thecalculatorstore.com/epages/eb9376.sf/en_GB/?ObjectPath=/Shops/eb9376/Categories/Calculator_blog

New products coming
Our contacts in HP have informed us about several new products in the pipeline. There are ultra-new things and some less new (to say the least) in the works. Estimated time of arrival on European shelves is July - maybe announcement will come sooner.

One of the calculator projects will likely sell in the millions (not hundreds of thousands - millions!) but the other will be a limited run of 10000 units - and that's all.

New HP50g vs Classic 15c
Classic HP15c vs new HP50g

I see the old HP15c derided by current users by comparing it with HP 50g. They laugh at the specs, the screen size, the programming model, etc. They wonder how mint units can get over 300 € on ebay and other sites.

I have both. In my common work, I use the HP 50g. I can see everything that I have done - sometimes I need to clear to unclutter the stack. However, it is clear to me that it is not a calculator for all purposes: I cannot take it to meetings, or when discussing with a colleague some alternatives, etc. For that, I have in my jacket the HP15c. (For that matter, I could use the HP42s instead - however, it takes longer to navigate the menus and do what you

another source: http://www.techpoweredmath.com/hp-12c-special-edition-hp-15c-re-release/