to convince myself that it is economically wise.
I bought mine for travel, and so mostly use it for keeping track of flight info, as a book/magazine reader, music, a few games, etc. However I just got the camera connector, and can copy my pictures off the card and onto here to share them with the family, and it's working great for that, but as Grant stated, it doesn't appear I can do much else with them from there ...
RAWs are uploaded with the Camera Connector kit but the embedded jpegs are shown and those are what are used for any processing you do with any apps on the Ipad.
You are partially incorrect.
Filterstorm allows the user to edit Bitmap images created from the Raw files. This capability however is dependent upon your camera and whether or not Apple has updated Raw compatibility. When this compatibility is lacking (Such as with the Panasonic GF2), a 1920x1440 resolution preview JPEG can be edited. Additionally, the iPad stores the actual image Raw file for transfer to a computer.
Filterstorm allows Raw exports up to 22MP from the iPad 2 and 7.5 MP from the iPad.
While some forums may not allow photos to be uploaded directly from your iPad, applications such as Photobucket allow images to be uploaded from your iPad for publishing on forums, websites, etc.
FilterStorm is my go to editing application on the iPad due to its ability to add layers while PhotoGene is a solid backup and has very good noise reduction.
I find the iPad to be a great tool for image editing, the majority of images I edit are made on my iPad.
Good luck with your decision.