Facebook said on its blog today that it’s beefing up its mobile team and making improvements to take advantage of a growing number of people who are using the social network while on the go. Since the beginning of the year, the number of active mobile users has jumped from 5 million to 15 million. One of the most recent features added to the mobile Facebook site is the ability to comment on your friends’ status updates.

“We didn’t expect that we would receive nearly a million status comments in the first 24 hours,” Facebook mobile developer Wayne Chang wrote. “This may not seem like much, but it was actually part of a really important change. As people on Facebook share more and more information each day, status updates have become one of the most popular ways for people to connect quickly and easily on the site.” Users can access site by going to m.facebook.com, or if the users have a smartphone, to an “extended site” at x.facebook.com.