A SCADA Dashboard is available in PNPSCADA
Here is what it could look like:

The dashboard is setup and runs in a browser.
There is a Dashboard Builder with which you can setup the screen.
Then there is a View Screen, which you can set full screen to show on your client's screen.
Please note that realtime is not advised for installations running on modems for 2 reasons:
1) it will be using data the whole time
2) GPRS modems are usually slower.
If you do want to run a realtime interface, use etherpads.
Adding a SCADA Dashboard:
Go to File->New

Special Reports

SCADA Dashboard

Enter a name for the dashboard

Main Interface
To access the builder, go to Edit->PNPSCADA Dashboard
You will see a screen like the following image.

On the left is the canvas, where the dashboard is shown.
On the right is the different types of gauges you can add. Just click a button and it will be added on the canvas.
Once a gauge is added, you can drag it to the position you want it to be.
You can select it and to the left, below the buttons, it will show options to configure that gauge.
Most gauges take at least one meter serial as input and below it a dropdown with the value that that you want it to display.
To change a color just select the field, and a popup will appear where you can select the color:

Available realtime values:

Currently S is calculated from volts, amps and angles

Odo

Options
Decimals: Number of decimals to show
Fractions: Number of fractions to show
Width: Width in pixels of the component
Height: Height in pixels of the component
Value 1 Meter: Serial number of a meter on your account, that supports realtime
Value 1 Register: The value that you would like to display on this component

Guage270

Options
Radius: Radius of the gauge
Min: Minimum value displayed
Max: Maximum value displayed
Increments: Increments from minimum to maximum to display
Font Size: Size of font
Needle 1 Color: Color of each of the needles
Value 1 Meter: Serial number of a meter on your account, that supports realtime
Value 1 Register: The value that you would like to display on this component
Up to 4 values (needles) supported

Guage180

Radius: Radius of the gauge
Min: Minimum value displayed
Max: Maximum value displayed
Increments: Increments from minimum to maximum to display
Font Size: Size of font
Needle 1 Color: Color of each of the needles
Value 1 Meter: Serial number of a meter on your account, that supports realtime
Value 1 Register: The value that you would like to display on this component
Up to 4 values (needles) supported

Label

Text: Text to display. You can use ${0} to display value specified in value 1, ${1} for value 2 etc. You can use \
for new lines.
Width: Width in pixels of the component
Height: Height in pixels of the component
Font Size: Size of font
Text Color: color of text
Back Color: background color
Value 1 Meter: Serial number of a meter on your account, that supports realtime
Value 1 Register: The value that you would like to display on this component

TimeGraph

Options:
Width: Width in pixels of the component
Height: Height in pixels of the component
Font Size: Size of font
Line Width: Width of graphed lines
X Axis Ticks: Number of ticks on X Axis
Max Time Range (Seconds): Number of seconds to show data before it "falls" off the graph (600 = 10 minutes)
Text Color: color of text
Back Color: background color
Line 1 Color: Color of each of the needles
Value 1 Meter: Serial number of a meter on your account, that supports realtime
Value 1 Register: The value that you would like to display on this component

To create a link that will always login, you can put the username and password in the link as such:
http://adam.pnpscada.com/gauge.jsp?LOGIN=subdomain.username&PWD=password
where subdomain.username is your username with the organization's subdomain before it (Under Edit->Organization->Subdomain)
and password is the login's password
For security reasons, create a Login that can only access the View->Dashboard screen, by creating a Role and under Edit->Role with the following setup