We have found the following links very helpful for learning about and enjoying Khon Kaen province. Useful links have also been provided for the Isaan (Northeast Thailand) area as well.
Mai Thai Guesthouse Highly recommended-great value
Khon Kaen Orchid Great location-superior service
Castle Howchow Resort (rural Khon Kaen)
Mut Mee Guesthouse The best Nong Khai has to offer