yes next time pls consider separate posts after researching each issue pls.
2) I do not think IMHO kde 4.1 is fully stable...hint hint.
but I shall attempt to address just the cam as I do not use samba.
pls read this if you get a chance.
ignore the sidux waffle and consider the searchable links after running lsusb to get the ids which you can then search in google.