I'm not sure what your question is but you can get great decorating tips at http://www.apartmenttherapy.com. Tips for utilizing every inch of small space. Decor that won't cause you to lose your security deposit. They understand about the 'white wall' rule most places have. It sounds like you done some research already if you know about strip-able fabric wallcovering for apartments. Have you considered just hanging fabric on that wall creating a false window look or even just for the sake of the design on the fabric? This might be better than worrying about stripping the fabric and washing when it comes time to move.

If you can post a photo people here can give some ideas for decor.

Here is a link that might be useful: Apartment Therapy

fun prints and accessories and your upholstery can make such a huge difference. Look at magazines. White is used more than any color to highlight your furniture, etc. put a fun shaggy rug down, hang a chandelier, find a cool hutch and start a collection of colorful pitchers or pottery etc. White can be your canvas.

You're right Dilly-- I see that I forgot to formally ask a question. The reason for giving all the background is to ask for advice on just the wall covering. In other words, given a 16 x 20 space with high ceilings, some red curtains, and sparse, fairly neutral-colored furniture, what's the best way to use wall coverings to make the space feel more intimate? Color and pattern ideas would be much appreciated.

If you are going to invest in something I would make it a take-away...so when you move out, you don't have to spend a lot of time cleaning up a wall and can use your decor in a new location. You might try a tapestry or a screen in the colors you are trying to match.

Here is a link that might be useful: screens