Seesmic Web is one of my go-to web apps, and I've been waiting patiently for the development team to add support for networks other than Twitter and Google Buzz. Today, there's been a refresh and a handful of new services have arrived -- including Facebook. Foursquare, and LinkedIn.

There's also added support for desktop notifications in Google Chrome, which you can see in my screenshot. They're an incredibly useful way to know when your Seesmic tabs needs attention. Yfrog has been added to your image posting options, and a number of other interface refinements (like color-coded direct mentions) have been made as well.

The update also brings a significant speed boost to Seesmic. The momentary lag I used to notice (especially in Firefox 4) is now totally gone, and Seesmic is zippier than ever.

If you've got a Facebook page, I've got more good news for you. Now that Seesmic has bolted on initial support for Facebook, Loic Le Meur informed me that page support is he's been wanting as well -- and that it's coming "very soon."

For more info about the refresh, check out Seesmic's blog post. Not seeing the changes in your browser? Hit the refresh button, or close and restart -- that should do the trick!