I just got my facebook fanpage URL! Now the link to my facebook fanpage is nice and short... no extra long URLs with a whole of extra numbers! :)
Facebook had put a requirement of a minimum of 100 fans for fanpages to get a username, but I found out from the Etsy forums that many people have been able to get their usernames with without having 100 fans. Neither of my fanpages have 100 fans but I was able to get a username for both.
To get a username for you fanpage, use this link: http://www.facebook.com/username/
At first people in the forums were thinking it was just a glitch that facebook was allowing them to get usernames without having 100 fans but I have read that facebook has lowered their requirement from 100 fans to 25 fans... This makes more sense (both pages have more than 25 fans).