Rendering of Mandelbulb in 11520 x 8640

http://web.me.com/trafassel/Website/Mandelbulb_in_11520_x_8640.html

The largest Mandelbulb I have rendered has resolution 12000x12000 (fake ambient occlusion, render time was around 20 minutes) but I don't know where I can show this image. Every services like Picasa, DeviantArt hast some limits. Mine the largest render with ambient occlusion based on many rays (160) has resolution 8000x8000 (render time 20 hours). It was published on DeviantArt: http://krzysztofmarczak.deviantart.com/art/Mandelbulb-8000x8000-147375101 (please use Download on left side to view in full resolution). I'm thinking about much larger render (20000x14000) and making printout on A0 paper format (1200x840mm)