The last episode to air was episode 366, on March 27, 2012. The manga is still in production.
Xbox Video mangles the "seasons". Bleach "seasons" are story arcs. There are 16 story arcs in total so far. Xbox Video only has up to episode 290. If you want to watch up to episode 366 and you don't mind subtitles, Crunchyroll has up to episode 366 and has
a nice app for the 360.