The use of punctuation marks on web links

On a web link or address (printed or online version)

Case 1)

If I have a reference for a link on a web page inside a paragraph, like this same example http://ift.tt/Uk6zXG. <= Should I use this period?

Or after this http://ift.tt/Uk6zXG I should not use a comma or period or anithing.

Case 2)

If I have several links http://ift.tt/Uk6zXG, http://ift.tt/19tFXS1, etc. Is it ok to use the comma?

Case 3)

I'm posting this example: http://ift.tt/19tFXS1. Is it wierd to use the colon ":" twice?

Case 4)

In programming, the use of CamelCase capitals and lowercase letters is usefull to read a complex word.

If I have a complexnameexamplewebsite.com Is it correct to write ComplexNameExampleWebSite.com to facilitate the typing? In web domains the names are case insensitive.

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Are this cases diferent on a web page vs. a printed version? On a website I can just let the punctuation mark outside the actual link, just as this page did automaticly, and people just klick it. But on a printed book?