Is it in any way possible to be a good Christian without attending worship?

Let's say someone accepted Christ into their lives and dedicated their life to him. This person read the Bible daily, prayed/praised God, witnessed to people either by conversations, pamphlets, or otherwise, tithed(sp?), fasted when necessary as per their particular branches practices, practiced lent (if Catholic), did missionary work, etc. They did all this but decided not to go to church.

Would they still be a good Christian?

I guess the same question coould be applied to any religion outside of Christianity as well.

Yes, anyone can worship in any way they want, should they choose to. Just because they don't go to the specific place of designated worship should not make them any less "good". If the religion does look at people in that way, then its not worth associating with in my view.