The shock and awe - 140 chars censorship limit on Twitter speech! .. now over - www.Tweetdeck.com - Deck.ly � TweetDeck - Your social world
www.TweetDeck.com - post tweets longer than 140 chars. Android, use www.tweetcaster.com - www.twitlonger.com
At the same time, I suggest to use www.blogger.com to post your regular blog, and deliver that to Twitter via, for example, www.dlvr.it, or some other means.
use www.hootsuite.com , www.tweetdeck.com , www.seesmic.com , they have multiple account support.
- the usual susspects :}
also www.twittergadget.com is good.