It is a bad news, Free asp.net 2.0 hosting provider, AspSpider has deleted all free hosting space on Jun 1, 2008. so all the examples about PDF creation and manipulation base on iTextSharp have gone. we can only have a look from this method now,
http://web.archive.org/web/20060423084401/aspspider.net/tonyfox/pdf/

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I just found aspspider reopened the free asp.net 2.0 hosting registration, it still supports Ms Sql Server Express 2005, but limits 10M space and automatically insert Kontera ad script.
btw, I installed ASProxy(a web proxy developed in ASP.NET 2.0) on my new registered one. And my another one has some PDF creation and manipulation demos base on iTextSharp.