General :: Sideloading APKs To Multiple Devices At Once?

sideloading apks to multiple android devices at once (like, 8 or 9 of em). Searched around the forums a bit and couldn't find anything directly relating to this issue, so I figured I'd ask. I dunno if this belongs more in App development, but its an Android specific issue so...

At present I'm using Test Flight App (I'd post the URL but I'm too much of a noob here) to manage builds and releases. Its really great for getting beta builds out to the studio team, and to various beta testers and potential partners.

1) Actually downloading the apks is a manual process per device. So if you've a small QA team (or are working solo) it takes alot of time to get the newest build onto everything.

2) Each build has to be uploaded via the Test Flight website, then distributed to users on a build by build basis. This is a difficult to automate process, so makes having any kind of continuous integration system for nightlies etc. difficult at best.

I've been looking into possibly doing something like installing a Dropbox on each device and automating CI builds to a dedicated folder, which is shared via Dropbox to everything, but its a bit of work up front to get it working and I may still have to actually manually install the things each time.