This is the first post in a series dedicated solely to Print Composer in QGIS 2.0 which you can already admire in recent nightly builds.
Guide lines & snapping for user-friendly map element arrangement
Arranging map elements has never been easier: Elements can be moved as freely as before but now they will automatically try to align with other elements on the page or the page borders. Additional red guide lines help interpret the snapping behavior.
Great news: Sourcepole has extended QGIS server to offer printing functionality for web maps based on print composer.
Selecting a print extent
You can test this functionality yourself on gis.uster.ch/webgis. The viewers are GeoExt-based. User can intuitively select a layout, extent, scale, rotation and resolution for printing. QGIS server will return a printable PDF.
If you want to learn more about what goes on behind the scenes, you find a good description on Sourcepole’s website.