I’ll assume you know what twitter is, if not then see my previous blog post: http://erniebryden.com/wordpress/?p=121

FAMOUS PEOPLE ON TWITTER
http://valebrity.com/ or http://thelistenerd.com/2008/05/07/some-people-who-twitter-who-might-interest-you . both good lists, just remember there are many fakes too.
TWEET LATER
www.tweetlater.com is a beauty, when someone adds / follows you, it’ll send a reply automaticaly which ofcoure you can cutomize. . My ‘auto welcome’ also directs people to this helpfull blog post. Please feel free to send people here too http://erniebryden.com/wordpress/?p=149 Another usefull feature of Tweet Later is the ability to schedule tweets to go out at time when you are not at your compute / asleep.
TWITTER SEARCH
Guess what? If you want to find tweets about any topic just go to http://search.twitter.com it’s great fun, it’s like google but straight to the point haha.
TWITSCOOP
Twitscoop http://www.twitscoop.com is another usefull place to search the latest conversations.
TWEETMEME
http://www.tweetmeme.com An up to date list of the most popular links on Twitter. So find out what’s hot and ReTweet if you want.
TWEETIE
http://www.atebits.com/software/tweetie. This is THE application to use if you have an iphone.
TWITTER BERRY
as the name suggests is the app you want if you own a blackberry, find out more at:  http://orangatame.com/products/twitterberry
TWIBBLE & DABR
If like me you have the Nokia N95 , two sites worth checking out are TWIBBLE http://www.twibble.de and DABR http://dabr.co.uk
TWITPIC
http://twitpic.com A must have if you want to share photos on Twitter, also note that many Twitter clients such as those for mobile phones have twitpic built in.
TWUBBLE
If you’re looking for more people to follow, go to http://www.crazybob.org/twubble and let it find more friends for you.
TWHIRL & TWEETDECK
When things start to get busy for you, you’ll need a desktop application that displays all your tweets, notifications etc the way you like them.

Check out http://www.tweetdeck.com/beta or http://www.twhirl.org

TWOTTO
Finally, Get thousands more followers and play the UK National Lottery for free here  http://twotto.org/ErnieBryden

I change my pc screen wallpaper a lot and in my search for beautiful images I found Photoree. Sites like Flickr are great too but Photoree ( www.photoree.com ) speeds up the whole process of searching. Registering is free and only take a moment. Most of the images are cc (Creative Commons license) which means you can use them freely and share with friends. The fun begins once you’ve rated about 100 photos, it recommends similar ones.