As if that wasn't cool enough, you can also schedule LinkedIn or Facebook status updates the same way you can schedule tweets. It also looks like a HootSuite app for the iPhone is on the way.
To add in a LinkedIn or Facebook account to your profile, just click on Settings and then the "Add Social Network" button. HootSuite uses the OAuth Facebook Connect and LinkedIn connect buttons to hook everything up.
Your Facebook or LinkedIn accounts can now show up in separate column in HootSuite. Just like you can update multiple Twitter accounts, you can update multiple Facebook profiles. Whether support for Facebook Fan Pages will be coming is unclear right now, but the Facebook updates also include the ability to add-in line comments on your friends status messages.
With Twitter Lists, you can add (or create) a new list as a separate column in HootSuite. You can choose from both your own lists and lists that you have subscribed to.
All in all, this is a solid update to an already solid product. HootSuite is especially good if you manage a number of Twitter accounts or want to get some better tracking data on your short-URLs. Adding support for multiple services natively (as opposed to the previous integration which was limited to just Ping.fm), HootSuite has really made it clear that it's trying to be an all-in-one social media tool.