Compact 1x1 loaders that use electricity. They are able to use separate filters on each belt lane, and can stack items on belts if stack inserters are available.
When you click on an "incoming" loader , the one that loads a chest, there is no gui so you cant set rules für network signals.
but you can copy them from inserter... so not a real bummer but somewhat inconvenient ^^
This has been fixed by Wube. There are some caveats though. The gui is available, but input loaders will ignore filters entirely. This is the the current implementation in the game engine.
