@artkavanagh
It depends on the use you are need on the move. Text editors are good tools when you plan to refine your work on another machine, but if you have to deliver a formatted document with using your tablet only, you're stuck unless your are proficient with latex (I guess... I'm not though).

In the last few years, I have been using more or less the complete series of Nokia Communicator smartphones. Starting from the 9210, they have been including a word-compatible (sort of) wordprocessing app which was enourmously useful to get a document while out, editing and resending. There are now apps on the symbian s80 platform (that of communicators up to now) which allow an almost perfect round-trip compatibility from word to the smartphone back to word.
It has been great to be able to make or edit work documents while out and send them as fax or email attachments... I hope to be able to do the same with the n800, and indeed it seems likely that it's only a matter of time and involvement of people with the same needs.

@bizshop:
unfortunately, writely.com as well as the majority of ajax web applications does not work on the tablet, either on opera or on the present version of the mozilla minimo browser. Minimo shows your document only but does not allow editing. The only possible hack is to modify the doc in html mode, which isn't exactly what writely or google docs were intended for... you better use a text-editor in that case.
I'd like to be refuted, but by now it seems unlikely.
This is the greatest limitation by now for these devices. I read elsewhere on this forum (in a much inflamed thread), though, that the priorities of the nokia team for tablets are flash and ajax, as opposed to java.
So this situation might change in the near future .