"SEO has been a great way for web sites to acquire new users, and will continue to be," said CEO Seth Sternberg in am email last night. "At the same time, site owners are looking for the next great way to attract additional users. i think that 'social graph optimization' can be the next SEO - making it really easy for your users to share content from your site to their friends, be they on social networks, IM networks, in email, etc."

Even cooler is the sharing option in the Meebo bar across the lower part of the screen. This feature enables users to share links via any IM service connected to their Meebo account as well as via Twitter, Facebook, and email. The feature reminds us a lot of Gmail Labs' addition of Google Search to email and chat.

This is what happens when the "Share" button in the Meebo bar is clicked:

Interested parties can get a closer look at features and functionality in this demo video:

Sites adopting the new tech from Meebo are expected to see significant spikes in user engagement. Partner sites announced today include Aeria Games, BakeSpace, Chictini, Fragegg, GamerNook, JamLegend, PlayedOnline, and SparkPeople.

Smub, which stands for "smart multi-use bookmarking," requires only that users type "smub.it/" to the left of the URL they wish to bookmark or share. Then, whether it's viewed on a mobile device or a computer, the browser goes to Smub's ten-button interface where users are presented with a modest but functional selection of link-sharing options. The service effectively eliminates the need for copy/paste functions and takes a few steps out of iPhone users' sharing process.

Todd Montgomery, Smub's Marketing and Business Development VP, spoke with us Sunday afternoon, saying, "I know particularly people who tweet do it frequently. Unless you're registered on Smub, it still requires you to log in to third-party services each time you share a link. This is something we're working on for the future."

Other long-term plans include allowing users to define and add other sharing/bookmarking sites outside of the initial nine.

Montgomery and the rest of the Smub team don't see the service as a stop-gap solution until smart phones get smarter, and they plan to add value across web and mobile interfaces. In addition to allowing users to export their content, he said, "We're also coming up with a list function. Instead of having to bookmark each link, you can create a list. Now, your friends will only have to go to one destination to see all the associated links," a function the Smub team thinks will be especially useful for academics and researchers.

Although their initial core focus is on the iPhone, Smub will be optimizing the user interface for Blackberries and other smart phones, as well.