I want to do a logo with this effect, i mean , i do a pattern or a design and i want to put it into a sphere.

How ?

I can't think of a good way to do this in Inkscape. You can do it in gimp but of-course you get a raster output. And is seem like there would be a way in blender, but I don't know.

Not posible in inkscape ?

It is of course possible to do this in inkscape. I think what earlyblake means is there's no easy, automated way to render "spherical topography" on a group of objects in inkscape. I have a few ideas using the clone->trace background tool and the perspective effect that might work. Let me try them out and see what I come up with.

edited to add my first round of experiments.
http://files.myopera.com/llogg/files/spherical%20topography.png
The top row is the underlying idea. Circle with radial gradient, tile clone using trace underlying image option and using opacity and size options. Then apply perspective effect.
Below that is the attempt to get something similar to item one on your example. Same thing as above, then use a triangle path, again tile clones to get circle of triangles evenly spaced, then combine triangle paths, center on "dot" path and do difference. Then apply perspective. Might get a better result to do the triangle path cutting before the half-tone-esque tracing. Not perfect because you don't get that curve you're looking for, but it's almost there.

Might be better to try and use pattern along path or other live path effects that I'm less familiar with.

Here's my second, slightly more successful attempt using the same basic approach as before, just being a little smarter about it.
http://files.myopera.com/llogg/files/sphericaltopography2.png

I suspect somebody with a better grasp of perspective than I have could use this technique to do multiple sequential linear perspectives to get a better facsimile of the curvature you're going for.

Just combine all the dots into a single path, and in Node tool, select all nodes and Alt+drag the middle one. If you have tablet, you can vary pen pressure to get different profiles of "sphericity".

bbyak: Wow! That works really fine. And it works smoothly with my tablet.

macti or bbyak, could you post an example of your results and maybe a brief snapshot of the workflow? Thanks.

Maybe it's the tablet. I was using node sculpting a few days ago make a polka dot pattern on an egg. (I was making an easter egg wall paper for s***s and giggles.) I did not think the results were that great. But I was doing it on with crappy mouse. The laser mouse I got in December is dead already.

so I used the alt-drag technique (my dots were already a single path) and it works great, but it's a little unpredictable for me. Any suggestions or tips on how to manage this consistently?

This is by its nature a manual, freehand operation, a drag. It cannot be absolutely precise. Perhaps what you need is a path effect - we do have such an "envelope" effect with several control points, but currently it is disabled in svn, hopefully will be back for 0.47.