Here is a NAnt script segment that builds all samples that was cut out of a larger NAnt script we use here to do nigthtly builds. You will have to tweak it probably, but maybe it can serve as a starting point for you.
NAntSampleScript_231.zip
There ar etwo main things to know moving from 1.6.1.8 to 2.1.0.9. The 2.0 uses a different licensing scheme. You have to make sure the licx file is used properly within the project you want to deploy to a system that does not have a properly licensed Syncfusion product installed. Here is a KB link on this.
http://www.syncfusion.com/Support/article.aspx?id=10469
You also may have to run your resx files through a tool depending upon what type of information you have saved in your resx''s. Here is a KB link on this. http://www.syncfusion.com/Support/article.aspx?id=10370