To shoot interiors a wide lens is key...as said above the wider the better. However...this does not make for good "architectural photography". One very important, key and integral element to shooting architecture is the ability to stay true to reality. Using an ultra wide lens as Matt Grum suggests, "is very handy as it'll make spaces look bigger," but takes you out of the realm of Architectural Photography. Just because it's a picture of a building...
To begin, you have to keep your vertical lines straight. Any wide-angle distortion and you're out. Use a shift/tilt lens to correct. If you're shooting for a magazine, you need BIG PIXELS. Somewhere in the 20's is a good place to start.
Back to your question: thanks to digital you can shoot multiple frames to adjust exposure for high-key elements like windows and lights and shadows. Good news there. Makes your lighting package a lot smaller. Can combine images through clever layer masking or HDR.
Bottom line, if you're using your 28mm, pano's are probably absolutely necessary to get the job done. That or rent an ultra-wide and be okay with heavily distorted images. Good luck.