Can I create a PNG from InDesign?

Sadly, there isn’t a straighter native way. There has been some threads on the topic on Adobe forums and even an Adobe employee recommends exporting the image in PDF and opening it in Photoshop — though it is kind of same as exporting it to a EPS and opening it in Illustrator.

One other thread comes to the same conclusion, but someone does indeed notice that it may be achievable with scripting.

Workaround for Windows: Install PDFCreator, which adds a virtual printer to your system. While PDFCreator is designed to create PDF-prints (for desktop & home use), it can print as PNG:

Create more than just PDFs: PNG, JPG, TIFF, BMP, PCX, PS, EPS

Then you could just print the pages you want as PNGs. (There might be some problems regarding transparency, though.)

^{_{Sadly, I’m yet to know any alternatives for OS X — but I’d be happy to hear one, since it’s currently my primary platform.}}