I am not very tech savvy with VOIP/OBIHAI or Google Voice. I have an active MagicJack account but my dongle has crapped out and I have just purchased this OBI202 and would like to know if I can and how I can have my MagicJack number call me on my OBI202/Google voice number. Is this possible? Will MagicJack/Obihai/Google Voice allow this?
No.
An OBi device is not a telephone or telephone company. It is a device that allows you to connect to telephone services provided by other companies, and not by magicJack.
You need to get a phone number from Google to use with Google Voice or else you can port in your existing mobile phone number.