Running multiple blogs, I am always nervous about people who leave links to their websites. I am ESPECIALLY nervous when those links are the abbreviated URLs. There is a way to “preview” this non-descript links before actually clicking on them, though. Although this still does not guarantee safety, it is at least a road bump.
A safety feature TinyURL has is that you can always default a preview by enabling the preview directly from their site at http://tinyurl.com/preview.php.
Ow.ly – http://ow.ly/tGslQ is the shortened link, but having problems finding out out to preview without one of the consolidaters listed below. However, one of the nice features about Ow.ly is that it goes through a verification step before creating your URL just to make sure it is not a bot doing the dirty work.
If you want a one stop check for short URLs, you can check out this website . . . it should detect and preview most of the popular ones http://checkshorturl.com/ which uses http://pagekeeper.com to check sites.
I am sure there are a dozen more url shortners . . . I will search more and consolidate here.