Just tested out Air Video. Works awesomely. Just download the free server software and it sets up everything fairly automatically. You just have to point toward the folders your media is located in. I downloaded the iPhone/iPad app ($2.99) and it worked quite swell.
Not sure what you mean by updating the marker. Is that like, you start a movie on your computer, pause it, then want to continue from where you left off on your iPhone? Not sure if it does that, but don't think so.
Anywho, give it a look, you might like it.
I can get that with Plex already, so yeah, not too impressed.
I'm talking play counts here and yes, if possible the marker for the play position, but that'd be bonus only.
Play counts are crucial.
Absolute deal breaker for me here.
Glassed Silver:mac