For Maemo 5 users : to better control the graphics made by 'Plot()', I have released new versions of SymPy.

SymPy 0.7.1 Maemo5 and SymPy interactive shell 0.7.1 Fremantle2 (04/02/2012), available in extras-devel repository :
- 'Plot()' and 'preview()' work with the optional dependency 'python-pyglet' on Maemo 5, to install it, type 'apt-get install python-pyglet' as root;
- Nokia N900 extra keys to control plots made by the 'Plot()' command.

Then, more improvements and fixes in the same day :

SymPy 0.7.1 Maemo6 and SymPy interactive shell 0.7.1 Fremantle3 (04/02/2012), available in extras-testing and extras-devel repositories :
- 'Plot()' and 'preview()' work with the optional dependency 'python-pyglet' on Maemo 5, to install it, type 'apt-get install python-pyglet' as root;
- Nokia N900 extra keys to control plots made by the 'Plot()' command.
- increased sensitivity of keyboard and mouse/stylus control for 'Plot()' graphics;
- removed '.pyc' files from package because they are created during installation.

The 'SymPy interactive shell' will appear as an update on your Nokia N900, just confirm the installation.