Nisus Writer Pro: pending in the spring

Nisus Writer Express is our family wordprocessor. I like it very much, but there are a few things I miss. Nisus Writer Pro sounds like it will have most of them. I do hope the upgrade pricing will be reasonable. I wonder if they'll support open document format, but their key value is selling a very solid and well structured wp that uses RTF -- the only real "universal" (meaning Word users open it without paying attention) document format.