The "umount - device is busy" issue: wbumount

[nf]

Hi list,

I have written a little gui-application called "wbumount" (who is
blocking umount?), because i want to make a "statement" on the "umount -
device is busy" issue. 

http://www.scheinwelt.at/~norbertf/wbumount/

Does this make sense to you? Please forgive me, if i'm saying things
that are wrong. I am primarily a linux-user (writing PHP and java server
apps), and not a desktop developer. And english is not my first
language.

regards,
Norbert