Yes, it is possible. They are not exactly simultaneous, as the channels are not sampled at the exact same time. For example, if you are sampling 4 channels at 10,000 samples per second, you sample the first channel, then 2 uS later scan the second, 2 uS later the third, and 2 uS later the fourth, then 94 uS later the first, to maintain the 100,000 sample rate. So there is an interchannel delay between channels; they are not simultaneous (but close).
If you open the file examples\daq\anlogin\anlogin.llb\Cont Acq&Chart (buffered).vi, enter the device number of your MIO board. The scanned channels defaults to 0, but if you click on the up/down arrows of the array of channels, you can go to index 1 and put in channel 1. This will scan channels 0 and 1 at the
specified scan rate (default of 1000 samples/sec). You can continue on and scan all 8 of your channels. You could also put the text "0:7" in the first index of channels which would accomplish the same thing; it would scan all 8 channels.
Hope that helps. Generally, there are many, many examples in LabVIEW which will probably be close to what you want. Start there when you can, and modify them to do what you need. It's MUCH easier than starting from scratch.
Mark