I know Semagic works with DW... I even got crossposting to work! (It has to be turned on by default, which means every time I want to write an entry that isn't crossposted, I have to go to the create entry page on DW, but that's close enough.)

I just want to be able to use the DW specific tags, basically. It seems like something that's not going to happen until I learn how to code it myself, and I'd seriously pay for this.