You really should try out gimp 2.4, it's been out since October last year and has vast improvements over 2.2 (2.4.5 is the current minor version). There both rectangular and elliptical selections can be resized (while they're "fresh", i.e. as long as no other tool is used/selection has been put on top of them which would "finalize" the selection, i.e. make a bitmap out of it).
I don't think there's a way to resize and rotate in one go, but I just did the following and it went quite well: Select what you want to resize/rotate, cut and paste it (so it becomes floating), move one corner to the desired location, select the rotate tool, move the rotation center on top of that corner, drag the second corner to its designated location (it won't resize now, but have the correct angle), use the resize tool, drag the second corner to its location. This will move the first one a bit, but you can drag it back again.
As for printing, gimp 2.4 has a much easier to use print plugin than gimp-print/gutenprint which where used with 2.2. You still can install and use the gutenprint-plugin if you need the level of configuration it offers.