It’s been a while since I did a Something for the Weekend tool review, but Twitter bookmarking service TagThis is such a great tool it needed covering.

TagThis allows you to bookmark any URL you see on Twitter to your own account on Delicious or Magnolia. This is particularly useful if, like me, you use Twitter on a mobile phone or iPod, and often see useful links on Twitter that you’d like to come back to later or ‘file’ for reference.

Here’s how it works:

• Follow @tagthis on Twitter
• Register on the site at tagth.is and enter your Twitter and Delicious or Magnolia login details.
• When you find a tweet with a useful link, retweet it @tagthis. Shortened URLs will be ‘unzipped’ and all words in the tweet will be used as tags – assuming you don’t want that to happen use a hash sign (#) before words you want to be used as tags, or add them.
• If you don’t want everyone to see what you’ve bookmarked, you can also send it as a direct message
• That’s it.

There are a number of mobile Twitter apps that make retweeting easy – m.Slandr.net is one, while Twitstat Mobile has a ‘tagthis’ button which automatically prefixes your tweet @tagthis.

If you want to find the URL yourself Twitfire is an iPhone/iPod app that allows you to search for a webpage then will insert a tinyurl in your tweet. Alternatively you can install the Post to Delicious bookmarklet in Safari and sync it with your iPod/iPhone.

Any other tips for bookmarking webpages on the move or through Twitter?