Despite the warning contained in the article in the previous posting, there is no doubt that Darwin was a fascinating chap.
A wonderful resource is the Darwin Correspondence Project. Darwin was a prolific correspondent (almost 15,000 of his letters survive!) and the website has the full text of 5,000 of them online and searchable. As well as containing some interesting pages (eg. Six things Darwin never said - and one he did), the website also allows you to simply browse and read the letters. Take a dip, meet Darwin the man.