Twitter, built by Obvious Corp., is a great way to constantly update people on what you are doing, think simplified blog. Short messages (under 140 characters) are posted by IM or web interface.

One cool thing about Twitter, is that you can update your Twitter feed using your Google Talk account. Simply add twitter@twitter.com to your contact list in Google Talk, and send it a short message. Using Google Talk to feed your Twitter opens doors to Twittering on your Blackberry device through the Blackberry Google Talk Client.

If you feel the need to constantly let friends know what doing, this is one easy app to try out.

Odeo, an early pioneer among podcasting sites, is up for sale. Odeo's creator, Evan Williams is aiming to be open and honest about the sale, and wants everything out on the table so he's blogging about it. The creator of Blogger and the founder of Obvious Corp who is the web development company behind Twitter, admits that Odeo has not gotten the attention it deserves.

Back in the day, Odeo did receive funding, but when things didn't work out; Evan bought it back and was trying to rehash a business model. Twitter has taken off, and they must spend their time with that application, so Odeo is on the market. As an alternative to a buyout, Obvious is currently looking at looking at different investment situations as well, from a cash offer to equity. The full Odeo pot includes selling the odeo.com domain as well as the studio.odeo.com platform, including all code, the brand, and a database of three million MP3s. So, if you're interested, drop Evan an email.

UPDATE: Evan was reported to have paid $5 Million when he bought back ODEO from investors.

[Thanks Jordan Running]