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Hi!
Since some people asked for it, here is an early version of my Mandelbox exploration software "Mandelflyer". You can download it here:
http://www.mediafire.com/?ma61ja6zl428ick

There is a small readme file you really SHOULD read before using the program. The program is not particularly suitable for videos, but you can make some simple screenshots, or just fly around - it's designed for exploration first and foremost.

I am not sure whether I will add much more functionality to the program in the future, but, of course, any feedback is welcome, just post it here

Thank you!

I look forward to trying this when I finish work.

Runs just fine on a nVidia GTX 460, Windows XP Professional 64bit.
EDIT: getting 20-40 FPS in 1920x1200 resolution.

To those running Vista and Windows 7. May I recommend a recent DirectX 9 redistributable package, e.g. June 2010 found here:

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=3b170b25-abab-4bc3-ae91-50ceb6d8fa8d&displaylang=en

Also it is never a bad idea to use the latest GPU driver from the manufacturer's web site (AMD/nVidia/Intel).

Christian

DirectX and ATI Radeon HD 4650 for 64bit drivers updated, and still the same error message

It works on my old XP laptop, but so slowly that it's not usable.

Anyway, thanks for making me update these, because the other realtime program "boxplorer" now works

Ouch, didn't expect that many problems

Sorry for that... anyway, on my Windows XP 32bit Notebook with Geforce 8600M the program runs just fine. On my Radeon 4850 Windows 7 64bit it used to run as well, but I just discovered it doesn't and just creates a black screen... but I was able to fix that. Create a file named "shaderinclude.txt" in the program folder and include these lines:

float arw_,arh_,arw1_,arh1_;
float w_,h_,w1_,h1_,wh_,t_,dt_,beat_;
float4x4 mat_;

Alternatively, just copy the attachment file to the program folder, it contains these lines. This should fix the "program works but no visual output" problems.
Some background: These are some additional internal shader variables which I thought wouldn't be required here, but apparently they are... why it creates problems only on some PCs will probably remain a mystery.

@bib
This fix probably won't resolve your problem but you can try anyway... the fact that the error message contains only zeros means that the program crashes somewhere where I didn't expect something to go wrong, so there really isn't much I can do... but as for improving the performance, you can try increasing the "xsp2" and "ysp2" values for downsampling during movements as explained in the readme. Default is 2x2, but I am using 3x4 on my notebook which still looks ok. Depending on how fast your notebook is, you can also try 3x4, or 5x5 or whatever works best for you.

Oh and out of curiosity: Can those of you where the program works tell me your fullscreen frame rate at the initial view and at what resolution?

It seems that I can't unarchive it without damaging it. I can't afford to buy one. Do you have a .zip archive?   

You really should read the readme file!  
These additional speed factors you removed control the rate of the raytracing, and can be manipulated easily with the keyboard (J and K in this case). The default values are more or less optimal for the scale=2 Mandelbox, but for your case, you need to reduce it from the default value of 2 to e.g. 1.3. Removing the entire term is equivalent to setting it to 1, which works well in your case, but is inefficient in other cases, and can also cause wall misses in yet different cases.
As for the performance, don't forget that the program is using subsampling! Without it, you would have only 11.125 FPS (or maybe 12 or so since the subsampling itself costs some performance as well).

As for 7zip (currently the best file compression in existence) you can get it here:
http://www.7-zip.org/

Anyway, great to hear that the program seems to be mostly working now.