The 3DS friends list is severely lacking, but the upcoming firmware update should add a much-requested feature.

A post at NeoGAF (via Eurogamer) reveals the update lets you join an online friend's game in progress, and also lets you organise your friends list by online status.

The update is included on the Japanese version of Super Mario 3D Land, but no word on whether it's on the Western cartridges. We should have our game soon, so we'll let you know.