What kind of functionality are you looking for? For me it seems that you have a lot of content that has already been published using eZp - and you wish to extract this in order to spellcheck and republish it..? OR: Are you looking for spellchecking-feature when content is about to be published? I think the latter might be implemented as early as in 3.4. There have been some internal rumors about this..
As far as I know, spell checking has not been implemented yet. I'm sorry to inform you about this. However, if you really need spell checking then you should contact eZ systems and ask if it would be possible to have it implemented as a payed support project. Send an e-mail to support@ez.no and ask.
For anyone using Firefox, I highly recommend you look at the SpellBound plugin (http://spellbound.sourceforge.net/). While some may prefer that the spell check is a part of the online editor, I like the fact that I can spell check any form field I type into - including on forums like this one!
Alex
[ bald_technologist on the IRC channel (irc.freenode.net): #eZpublish ]