This how-to will enable you to print and scan with a Brother DCP-7010 printer under Arch Linux. (For deb- and rpm-based Distributions, there are drivers available.)
- Install brother-dcp7010 and brscan2 via AUR
- Install sane and a frontend for it, e.g. xsane
- Add your user to the scanner-Group: gpasswd -a username scanner
- Add the keyword brother2 to /etc/sane.d/dll.conf
- Log out and back in
You should now be able to print and scan.