Pingvine is a service that allows users to post blog updates or any RSS feed to twitter and other sites. You already might be knowing Twitter, and many bloggers push their blog updates to twitter. Now a days lot of people use twitter to get their news so it makes sense to push your new content to your twitter followers.
Pingvine pushes any RSS feed to twitter, ping.fm, Identi.ca at a specified interval. Similar service is twitterfeed, which is quite popular for sending RSS feeds to twitter. The only limitation of twitterfeed 30min time limit in sending updates. Pingvine allows to post updates at any time interval of your choice.
The interface is simple, enter your twitter account name and password, enter the RSS feed and set the time interval and submit. There is a lot of chatter about entering twitter credentials in third party accounts, so keep in mind that you are entering your login credentials. Pingvine currently allows only one RSS feed to be associated with a account. From the site it looks like they are adding support for several sites, which is good for users. If you want to push your blog updates to twitter give this tool a try.
I think this service is down ..:(
If you are looking for a reliable & fast alternative RSS to Twitter service, try http:/dlvr.it.
Dlvr.it provides speedy delivery of your content to Twitter and Facebook, and gives you rich content engagement stats including clicks, followers/friends, and retweets.
Use the invite code: FEEDTWITTER