There is a good short description of rootfs on the wiki. Feel free to ask more questions if you'd like (if I can't answer, chances are someone smarter than me will stop by and help).

To choose a better subject, using the fewest possible number of words, ask a short form of your actual question, so maybe "Desktop widget free memory values: do these look OK?" instead of the slightly generic "Help!" or whatever

Hint: you can also edit a thread title after you started the thread by editing Post#1 in that thread.

Thank you it helps others help you and also helps other people find information which could be useful to them later (and maybe helps you find it later, too).

Also, don't forget the thanks button that way we can measure who is most helpful... or at least who writes the most posts on which people clicked 'Thanks!'