It is vitally important that you understand the vulnerabilities of using any service like this. Please learn a little bit about MITM before extended use of short Bitcoin URLs.
Alternative address shortening services:
|http://firstbits.com/||FirstBits relies on a well known and established protocol for identifying the first unique bits of your Bitcoin address. Because of this, it is almost invulnerable to a MITM attack. Unfortunately, it requires some Bitcoins spent to your address before it can work. If you’d like to use this method from the start, here is a quick tutorial.|
|https://btc.to/||A well trusted shortening service, run by MTGOx.com. Because this service may stop in the fututure, it is recommended you ultimately use FirstBits instead.|