I've been using the beta for a few weeks now and it does a great job with both the X-Pro1 and X-E1. Previously I had been running the RAF and JPGs through lightroom as this was the best option for me in the absence of Capture One support. I didn't really like using any of the other converters such as RPP and Silkypix - mainly because I didn't want to learn a new app and also because I didn't like their workflows.
With Adobe ACR supporting the Fuji I was hopeful that it would do a good job rendering the RAF files but in reality I found myself more often than not using the jpg. The Adobe rendering of foliage details was very disturbing due to smearing, plus I found that reds were over vivid and also smeared in shadow areas. The jpgs by comparison looked a lot better. Capture One is much much better with it's rendering of reds in my comparison images and has less of the smearing of foliage details from what I've seen with the beta. I was able to return to using the RAF raw files vs jpgs and may stop capturing them any more.
The best thing is that I can now go back to using one raw converter to handle all of my file formats for the cameras I own - Phase One, Leaf, Nikon and now Fuji X-Pro1 / X-E1.
With respect to the Fuji cameras, I'm a big fan of the colour rendering and most importantly the usability. I particularly like the handling of the X-Pro1 vs X-E1 in my hands - I like the greater heft of the X-Pro1 particularly with the RRS L grip that I use on it. Fuji's glass has been excellent with even the new 18-55 zoom living up to expectations. I use a Voigtlander 12mm for super wide and a Zeiss 85/4 for a longer telephoto - both in M mount with an adapter. The 35mm is a very sharp optic and I also like the 18mm a lot and that was more often my go-to lens. The 60 macro is also a nice lens but is significantly bulkier than it's other siblings when the hood is added. As mentioned, the new image stabilized zoom is a very nice package on the X-Pro1 but I found it lens heavy on the X-E1. I actually leave my 35mm or 18mm on the X-E1 as it's a better balanced package with the smaller lens.
There's a lot more feedback on the cameras over in the Fuji section. I'm a fan but there are folks there turning out some great work with these cameras. They are what I would regard as photographer friendly cameras vs a lot of the m4/3rds that always felt like Japanese technical appliances IMHO.