Feel free to integrate the BioWeb.me service with your site. This service provides an API which works with GET and POST methods.
The simplest method is GET: all you need is to send a query string with an encoded URL, for instance
As a reply, you'll receive a plain text string with the shortened URL, something like
GET variables allowed:
go - either "twitter" or "pownce" - redirects user to post forms on Twitter.com or Pownce.com with new short link filled in forms automatically.
Alternatively, you can use the POST method with a link http://bioweb.me/?module=ShortURL&file=Add&mode=API
url - single URL
tag - custom string to use as the link name (note: if the name is taken, you'll receive an error message instead of a new address)
pass - password (numbers and english letters allowed - but no special symbols)