call to action button with link to external page

I'd love to use my prezis as a marketing channel. Therefore I'd like to have the possibility to have e.g. a "Buy now >" button where I can define a link to a webpage which will then open.  
Think of a prezi as a landing page... wouldn't that be cool?! 

But for that, an important function is missing...
As far as I know, the only way for embedding an external link ist to write the complete url like "http://mypage.com" ... not very charming ... so my button would look like [http://domain.com/buy-bla] .... :-/ The urls are usually way longer... 

I see two solutions: 
1) Make it possible to link regular text like on any webpage
2) Create buttons which can act as a link to external webpages

If security issues are the reason for this behavior, you could show the full link on mouse over, like the title tag of a html a-tag... 
 
I'd prefer solution no. 1...