Right now dubbed is at episode 205 (ongoing) and subbed is at 516 (ongoing).
'Episodes' of One Piece are the animated TV shows based on the One Piece manga.
That happens many time.
One piece episodes
The one piece Strong World movie and the Thriller Bark arc
Yes.
till now the manga has over 600 chapters and the anime has over 480 episodes
Episodes 313-14
Now one knows because one piece is still being made,i'm watching episode 628 but i think there is going to be 1000 episodes as i said know one knows so it only depends if luffy finds the one piece
crunchyroll or opanime .net
Every week except for some.
Yes, they do.
You can get all of the episodes on hulu.com