Thank's for your nice words.
I have tested every version of Sparky on virtual machine and on my old laptop with Pentium M :
- main (e17) and Fluxbox releases need minimum 150 MHz CPU and 50 MB RAM
- WMaker needs minimum 100 MHz CPU and 50 MB RAM
For normal work I suggest (at least) CPU 266 MHz, 256 MB RAM and 256 MB SWAP (or bigger of course).