I was reading the news when I saw someone talking about this project http://custom.nimblex.net/.
Fully online, you can choose from a miryad of options and build your custom distro, then the site makes an iso and make it available for download for 12 hours, so be quick!
The distro is nimblex, like the url says, a Slackware based distro that uses KDE.
It's a wonderful project, so I thought I should share with you.
Thx for the attention.