OhNoesQueues is a great little addon that replaces the Battleground description txt in the Battlegrounds tab and replaces it with icons showing how many of each Battleground Mark you have. Left-clicking these icons will queue your whole party/raid if you are the leader, or queue you alone otherwise (a nice touch, since without this I often accidentally queue myself rather than my group). You can also unqueue yourself by right clicking the relevant icon.

OhNoesQueues is available for download from Wowinterface.com.