I am in the process of reading DH's virology book about the filoviridae family. (As a veterinarian, he is required to learn about zoonotic diseases, which this is. We have also discussed virology in depth since this started to become an apparent problem.)
My logical conclusion is that NO, IT CAN'T BE SPREAD VIA MOSQUITO. It would be more widespread, outbreaks would happen more often, and there would be many, many, many more cases. Just think of the prevalence and spread of malaria in Africa. Ebola isn't even a statistical blip on the radar compared to that scourge.
ALSO, YOU CAN'T CROSS EBOLA WITH THE FLU, OR WEST NILE, OR LYME, OR ENTEROVIRUS, ETC. THEY ARE ALL COMPLETELY SEPARATE FAMILIES OF VIRUSES! IT WOULD BE LIKE MATING A CAT AND A COW. EVEN IF YOU COULD GET THE PHYSICAL ACT DONE
THE GENETICS SIMPLY WOULD NOT WORK.