410's size is, pardon the gender bias, great for ladies.
Not the ladies I know...many of them use bodies that are larger than the E-1, and when doing landscape photography use lenses that are over 2ft long. Personally I prefer smaller and lighter for walking around, that's why I chose the E-300 and use a 500mm mirror reflex lens...of course I would have love the E-410 when I bought (although I would have liked the E-510 features on it). I tried the E-410 and E-510 a few weeks ago.