Currently there are no ready-made daily images done for N900. There is however weekly images available in http://repo.meego.com/MeeGo/builds/ repositories that are made after September 24th 2010.
Kickstart files are stored in gitorious repository http://meego.gitorious.org/meego-os-base/image-configurations In this repository the master branch points to the current main development branch. For MeeGo 1.1 for example there is branch called MeeGo1.1 where latest MeeGo 1.1 kickstart can be found.
Follow the instructions in Creating image using MeeGo Image Creator to create the raw image with mic-image-creator. For Nokia N900, you want to make an SD card install so you should create a 'raw' image.
see: Installation methods for howto write the image and start it up.