Tweet Old Post
Tweet Old Post is no more tweet old post because you can even post your latest tweets with tweet old post now. Tweet old post was designed initially to tweet your old post. But the changes made to tweet old post will also allow you to tweet your latest post, thus not only keeping your old post alive but also, promoting your new posts.
New in Tweet Old Post v 3.0
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OAuth
Added OAuth authentication. You just have to click on the signin button and login to your twitter account to associate it with Tweet Old Post to which tweets are to be posted. If successful it will show you your avatar and give you option to DeAuthorize.
If you want to remove the association between your twitter account and Tweet Old Post plugin you'll have to DeAuthorize your twitter account from Tweet Old Post plugin. You can then associate another account with Tweet Old Post.
Minimal Interval Between Tweets
You need to enter Numeric value. This value is Interval between two tweets. This value is in hours. It has to be minimum 1 for your tweets to be posted.
Random Interval
This is a contributing factor in minimum interval so that posts are randomly chosen and tweeted from your blog. This value should be Numeric. This value is in hours and should be minimum 1 for your tweets to be posted.
Minimum age of post to be eligible for tweet
This is minimum age of your post to be available for tweet. This value is in day / days
If you set it for 10 days all your post older than 10 days become and are eligible for tweet, and one of them will be randomly picked and tweeted. Any of your post which is published in last 10 days will not be tweeted.
If you want your latest / today posts to be tweeted you can set this value to 0 day. 0 day means the post which you just published will also be eligible for tweet and will be considered while tweeting by tweet old post.
Maximum age of post to be eligible for tweet
This is maximum age of your post to be available for tweet. This value is in day / days
If you set it for 20 days all your post older than 20 days are not eligible for tweet, and will not be tweeted.
if you want to tweet your latest post of today and day before, you can set minimum age to 0 day and maximum to 1 day.
If you want to tweet your posts of last 10 days, you can set minimum age to 0 and maximum age to 10.
If you have more ideas or suggestions about Tweet Old Post feel free to drop a comment or mail me. Looking forward for your replies 

Some of the options you can configure for the Tweet Old Posts plugins are, Twitter Username & Password – Using this twitter account credentials plugin will tweet. Minimum interval between tweets – allows you to determine how often the plugin will automatically choose and tweet a blog post for you. Randomness interval – This is a contributing factor in minimum interval so that posts are randomly chosen and tweeted from your blog. Minimum age of post to be eligible for tweet – This allows you to set how old your post should be in order to be eligible for the tweet. Categories to omit from tweets – This will protect posts from the selected categories from being tweeted. Download Download
Added two more options and one action button, Tweet Prefix – Allows you to set prefix to the tweets. Add Data - Allows you to set if you need to add post data to the tweets. Tweet now - Button that will tweet at that moment without wanting you to wait for scheduled tweet. Let me know if you have any suggestions or comments or critics for this. v1.3 changed Dec 12th, 2009 URL Shortener Service – Allows you to choose URL shortener service from some of the predefined ones. v1.4 changed Dec 27th, 2009 Hashtags – allows you to set default hashtags for your tweets. v1.5 changed Feb 14th, 2010 Maximum age of post to be eligible for tweet – allows you to set Maximum age of the post to be eligible for tweet Added one more shortner service was looking for j.mp but they dont have the api yet. v1.6 changed Mar 24th, 2010 – Made the plugin PHP 4 compatible. Guys try it out and please let me know if that worked. – Better error prompting. If your tweets are not appearing on twitter. Try “Tweet Now” button you’ll see if there is any problem in tweeting. – Added 1click.at shortning service you need to get the api key from http://theeasyapi.com/ you need to add your machine IP address in the server of http://theeasyapi.com/ for this api key to work.