I have been to Bandipur National Park last week (July 25th 2009) and it was one of the most amazing trip of my life. The best part was stay in "Tiger Rench" (don't get confused - it's really difficult to encounter any Tiger there). If you wanna to see tiger there then I would suggest go to some different Park (may be Kanha National Park in M.P.) otherwise you will get depressed .
Nope...I didn't see a single tiger there. As I mentioned before, if you want to see tiger, go to Kanha National Park. I have been there in May'09 and we were able to see tiger from a distance of around 50 feet. That was awesome moment.
I hear that the Ranthambore National Park is also a good place to see tigers. I'll be in Sawai Madhopur for a personal visit in September, but I read on their website that the Park is closed till October.
I had been to Ranthombore in June and it was awesome. Saw 3 tigers on first safari. On 3 tigers on the second safari. The tiger was really close like less than 10 ft away and with over 200 people watching him from the several canters and gypses. The terrain is beautiful and you should visit Ranthombore at least once. We stayed at a government lodge called Vinayak. The food and the staff are really great. They even arrange your safaries for you.