I have been trying to find new Petzl Lightweight hammersPetzlLightweight hammers for Petzl NomicPetzlNomichttp://www.petzl.com/files/imagecache/product_outdoor_slideshow_image/node_media/nomic-1_1.jpgThe NOMIC allows the entire rock climbing repertoire to be transferred to ice. Thanks to its adjustable ergonomic handle, it offers multiple grip modes and limits the risk of snagging when switching hands. The ICE pick allows easy penetration in any type of ice, and pulls out easily. The modular head has two removable pick weights to balance the axe and propel it into the ice with an exceptional swing. The NOMIC can also be equipped with a hammer when placing pitons., which Petzl apparently manufactures now. I reckon the older larger hammer would be better for actually pounding in pins, but their weight has adverse effect on the swing, which I reckon is usually far more important than the effectiveness of hammering in the pitons.
They seem to be very difficult to locate though. Maybe vaporware, all too familiar from the IT industry, has landed in climbing gear industry as well.
Update 2013-10-23: I did manage to find those hammers and have used them the last winter. I can verify that they do not spoil the swing, so all is fine on that front. haven't pounded many pitons with them so jury is still out on that front, but given the shape of the shaft I suspect hammering is about exactly as awkward as it is without it. The difference is that you won't abuse the head of the tools. So, looks to be pretty sweet compromise. The only real downside is that you need to use new style picks which have a cutout for the hammers. This is unfortunate, as I feel the old shape of the picks was better, mainly because it was easier to sharpen (new picks require a mjaor reshaping when your picks shortens.)