The new version sure rocks! Though I came across some issues regarding window management. My windows (at first) seem to become too unresponsive due to the new implementation of better(?) window handling. But eventually I made my way out of that by working around and avoiding some maximizations done on my main canvass.
Prolly the best feature I like about the newest version of GIMP (2.6.1) is the capability to pan beyond the image border, which is very helpful for me since I do a lot of bezier curve manipulations and extended handles are sure pain in the ass with the older versions of GIMP since I have to zoom out the magnification by a great value just to "drag in" the handles.
I just downloaded the portable application of GIMP 2.6.1 to my USB drive. I really like the way the entire menu is now on the image window and the tool box just follows with it when you minimize or open. The customizable zoom percentage is nice too. Maybe there are other things I haven't found yet, but the rest seems to be pretty much like 2.4. I don't understand why the GEGL operation is optional, but I notice that the control of gaussian blur is very superior and adjustable in a better way.
im guessing, since i never heard of it before, but have portable openoffice. but i think that basically u can download it and put it on a usb stick so u can use it on any comp even if it doesnt have openoffice. thing is, my brother told me openoffice portable only works on windows. >.>