Current Gear:
Fuji X100
It's more than a retro head turning design. Great out of camera JPGs, sharp lens at all apertures, great micro detail (weak low pass filter) and usable ISO to 3200. Lots of reviewers complaint about the funky UI and controls. Honestly it's easy to get used to. I have 3 different cameras with different UIs they all have their quirks.
Sigma DP1x
In summary a strange and quirky camera. It's slow to focus, useless at any ISO above 100, not good in low light, anything but RAW is awful but when conditions are right the results can be exceptional. There is lots of detail in the RAW files and the sharpness is excellent.
iPhone 4
My everyday camera. I never imagined I would it as much as I do. Favorite apps include Snapseed, Simply B&W, Filterstorm and Instagram.
Nikon D300
Great SLR, fast autofocus, exposure can be tricky when compared to my X100 which is almost always accurate. I only shoot RAW with my D300, JPGs are good but post processed JPGs from RAW look better. The RAW files require some work (sharpness and noise).
Current Lens:
Nikon 20mm f/2.8
Nikon 50mm f/1.8 D
Nikon 18-200mm f/3.5-5.6G IF-ED AF-S VR DX
I would like to move up to a full-frame DSLR and like a lot of photographers I'm intrigued with the new D800E. I'm a bit of a convert when it comes to low pass filters (AA filters); the DP1x has none and the X100 has very weak filter. I can see the difference. I've never experienced moire on any of my photos but then again I'm primarily a landscape photographer. The only think that concerns me is the 36 megapixel sensor and what appears to be poor ISO sensitivity compared to the D700. I'll wait for more reviews and comparisons.
Lots of chatter lately for and against low pass filters. In the end it comes down to what you shoot.
The Naked Sensor http://www.luminous-landscape.com/essays/the_naked_sensor.shtml
I went with Nikon D800 with the Anti-Aliasing Filter http://scottkelby.com/2012/24632/