Body elements

As befits its positioning bang in the middle of the EOS range, the 60D loses the joystick standard on high-end models, but it does retain the all-important rear control dial (something you don't get with a Rebel). Inside the control dial is a multi-way controller and SET button that replaces the joystick. Note that the dial is now unlocked using a button rather than a physical switch.
Like the 7D above it and the Rebel below, the 60D gets a combined live view/movie record button, well-positioned for operation by your right thumb.

Its behavior is more Rebel-like, though; only when the command dial is set to the Movie position does it start and stop video recording. In all other modes it's used to enter and exit live view.
The 60D uses the new LP-E6 Lithium-Ion battery (as seen on the 5D Mark II and 7D), which provides 13Wh of capacity (5Wh more than the BP-511A used in the EOS 50D) and also communicates more detailed battery status information back to the camera.
The 60D sees Canon's mid-range migrate to SD/SDHC/SDXC cards (the 50D and all its predecessors were CompactFlash). Given that you can already buy 64GB SDXC cards and that the 60D is being sold as a step-up model for Rebel users, this seems an eminently sensible decision (though one that will frustrate anyone with a large collection of CF cards).
Under a rubberized flap you'll find the EOS 60D's various connection ports. From top to bottom: 3.5mm stereo mike socket, HDMI socket, a combined A/V output & USB port, and remote release terminal. The latter is now of the E3 type, and shared with the models below it in Canon's range, rather than the 'pro-level' N3.
The EOS 60D has a metal EF / EF-S lens mount which means that it can use the full range of Canon EF lenses as well as the designed-for-digital EF-S lenses.

Because the sensor is smaller than a 35 mm frame all lenses are subject to a field of view crop (sometimes called focal length multiplier) of 1.6x, thus a 18 mm lens provides the same field of view as a 29 mm lens on a 35mm camera, a 50mm becomes equivalent to 80mm, etc.
The 60D's mode dial offers a very similar range of options to the EOS 550D (Rebel T2i) - and the EOS 50D for that matter. Where the EOS 50D had two user-configurable custom modes, though, the new model only gets one. Directly below the mode dial is the 7D-like main power switch.

The biggest change is that the dial must be unlocked (by pressing the button in the middle) before you can turn it, making accidental mode changes a thing of the past.
The top plate controls have been simplified so they all have a single function, which certainly makes them a lot easier to use. They give access to the core camera controls of AF and drive modes, plus ISO and metering pattern, with the ISO button having a little raised to dot to make it easier to identify by feel with the camera to your eye. Next to these is a button for the top-plate LCD panel's illumination light.

This does mean you lose direct access to white balance and flash exposure compensation (which are now accessed via the Q menu).
The flash has the same spec as the one found on the EOS 550D (Rebel T2i) and the EOS 50D. It can sync up to 1/250s and has an electronic pop-up release, so in Auto exposure mode will raise itself when required.

The 60D loses the PC sync terminal but gains the ability to control a group of flashguns wirelessly - a feature that first appeared on the EOS 7D.
The EOS 60D's hot-shoe can be used with Canon and third party flashes (although sync only on most third party units), and is E-TTL II compatible. Compatible flashes include the Speedlite 220EX, 270EX, 380EX, 420EX, 430EX, 430EX II, 550EX, 580EX, 580EX II, Macro-Ring Lite MR-14EX, Macro Twin Lite MT-24EX and Speedlite Transmitter ST-E2.
Another new body design means another new (optional) battery grip - in this case it's the BG-E9. We haven't seen one so you'll have to make do with this pretty picture.