Ive also been feelin this music a lot lately. Ive always felt a lot of the Slip stuff shares similar qualities, its awesome you all are too...I wonder if this is a natural progression for all of our ears after being on the slip for so long or just a coincidence?
Heres a few more bands that I have gotten into, some of which you probably know:
Gastr Del Sol - This band is no longer together but have some great albums, Serpentine Similar, Mirror Repair, Camoufleur. They have a myspace, check it. (a song is on my 'space page right now) I bought 'Serpentine' for 7 bucks at Kims and that shit has not been off repeat.
The Sea and Cake - I think some of the ex-gastr members joined this group, not for sure on that. Indie-post-jazz-experimental whatever you want to call it at its best...One Bedroom and Oui.
XIU XIU - yes.
Sigur Ros - they will make you cry. (i did at their show last year)
M83
Boards of Canada - could be classified separately from post punk but it all lumps together.
Stereolab
Fly Pan Am - good ambient background
Radiohead - duh.
Post rock branches off in so many directions...subsequently my favorites are doin that jazz-experimental thing, but Im also getting into bands that transcend post rock and dip into post punk/new wave.
I missed Do Make Say Think here in nyc, not enough change in my pocket

And if there's one thing I know to be true, it's let what you love be what you do.