does anyone know if its possible to be online and working over the LAN at the same time with miamidx??
Yeah, I've been doing it for a long time now. Do you have two network cards? Doesn't really matter if you don't because you can do it with one network card and a serial port, or even just two serial ports. The key is to set up two "interfaces" in MiamiDx. In the "LAN Connect" settings (button in the TCP/IP section of config), one interface will be set to "Internet" and the other set to "LAN". Set up the LAN interface as a gateway for the machine(s) that you have connected to it and use internal IP/NAT to get from that interface to the Internet interface.