As everyone is already aware of, DNN 4.3.1 came out a while back with updated FTB (internal links and things like that)
Well, that changed provider itself quite a bit. In previous version I've integrated NetSpell into FTB by article given here, but since FTB changed in 4.3.1 I was not able to integrate it again.

Can anyone help/integrate some server side spell checker into new version of DNN?
Hope someone can help.

Hello,

I would ask the original author of the article if they can offer any advice. - The link to the article is:http://www.bitethebullet.co.uk/DNNn...fault.aspx

Thanks,

I did sent one E-Mail to the author about 3 weeks ago. Never got a response back. I guess he is way to busy or just doesn't care any longer =) I thought maybe someone here will be able to figure it out with reference to the old article and maybe write a new one =)

Not sure if you're still looking for this but I use a spell check control from telerik in all of my ASP.net apps that I developed.  I think I paid around $200 for this control but it is very slick and you can down load a free 30 day demo to try it out before you purchase. 

I checked into it with telerik tech support and found that it can be integrated into DNN but I have not tried it myself yet.

Here are the directions I received from telerik tech support:

If you want to have spell checking in the html editor then you will need to edit the ~/controls/TextEditor.ascx file, which contains the html editor declaration.
Copy the spell dll file in DNN's bin folder and the RadControls folder to DNN's controls folder. You need to set RadControlsDir="~/controls/RadControls" because DotNetNuke has a built in URL rewriter, which will interfere with the spell dialogs if you place the RadControls folder in the default location ("~/RadControls/").

Alternatively, you can use our custom Html editor provider for r.a.d.editor, which has the r.a.d.spell spellchecking already integrated.