How can I wirelessly transfer photos from my iPhone to my computer without using Photostream? Sometimes I take a quick photo with my iPhone's camera and I need to get it onto my iMac.
I'd love to do this wirelessly (like syncing and everything else).

I'm aware that iCloud's Photostream should allow me to do this, but I don't have a new enough version of iPhoto to access it. I really never use iPhoto, so it's hard to justify an upgrade.

When I connect my phone to the computer with USB, there are a number of quick ways to get photos off of it. Image Capture, Preview, iPhoto, etc. But, none of those options are available via WiFi or Bluetooth.

Is there a way to transfer photos from my iPhone to my iMac wirelessly and without using Photostream?

Ideally, Image Capture and/or Preview would see the phone as a networked camera.
You could use an iPhone app like WiFi Photo Transfer (There are a few of those available in the app store), but I don't think this is going to be any more convenient than simply plugging your phone in.

Another way would be to take the photos with Dropbox. The Dropbox iPhone app let's you take phones, which would just appear in your Dropbox folder on your Mac.