Yes, Reader just uses the standard "send" Intent.
Here's an example:
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, title);
intent.putExtra(Intent.EXTRA_TEXT, url);
intent.setPackage("com.google.android.apps.reader");
try {
startActivity(intent);
} catch (ActivityNotFoundException e) {
// Reader is not installed
}