Lomo Photography Effect

I've always liked the look of Lomo photos (typically bright colored and highly saturated with darkened edges), but I didn't want to worry about getting another camera or messing with film & scanning. Yesterday I asked people if there was a Photoshop filter that could turn a regular photo into a Lomo-style photo. Several people responded with the Melancholytron filter and a tutorial on achieving the Lomo effect without using filters.