More in HP products.
Itanium is called IA64 (Linux has a port for IA64)
Even Debian has a whole arch for it.
Itanium2(Also runs IA64 Code but quite a bit faster) has also been available for a while... not sure how long...
Itanium AND Itanium2 have sold about 7000-8000 Processors. Considering how much these babies cost... That is still quite a bit of money, but not enough to cover the R&D of a Dead Product.