I've made posts before linking buddhism and christianity, but this would probably be one of my bolder statements, though I doubt this would surprise many of you, if at all.

Both of them went into deep prayer/meditation and fasting for a period of time (for jesus it was 40 days, for siddhartha the time ranges from 1 day, to 3, or up to 45 days depending on the source). Both also confronted a devil archtype at the end right before enlightenment, for jesus it was the christian satan, for siddhartha it was mara. The temptations were similar as well, with promises of riches and glory to jesus, and women for siddhartha. After all has happened, they go on to begin preaching and teaching.

From this, it would not be too unreasonable to say that jesus was also a buddha? Albeit the term was not available in the middle east areas. The differences in their teachings could also have been due to cultural differences and jesus having to use terms and speak in a fashion to make the community more easily grasp his teachings.

Here it talks about siddhartha's enlightenment:
http://buddhism.about.com/od/buddha/...the-Buddha.htm