Having editable Text, Ellipses or Curves in a vector layer is all very nice, but every serious vector editor must offer a way to represent arbitrary shapes. That is the reason why in the next RWPaint, there will be a new drawing tool called simply Shape.
Once upon a time (about 1 year ago) I received a curious email from Zoe titled "Business proposal for RealWorld Graphics". It contained anonymous flattery and a question whether I would like to hear "a business proposal" - a clear spam/scam to every veteran internet citizen. But I was in a playful mood and replied to that email with these exact words: "I do not know if I am interested..."