You can use your xats to buy a short user name (4-9 letters).

Rules:

• You must comply with the terms
• Short name costs vary, press "Get cost" to find out
• If your short name is unused for 90 days it may be sold again
• Only one short name is allowed per person
• Your current name will be replaced and lost
• Short names cannot be transferred between accounts
• If you choose a short name that is offensive (in any language) it may be deleted without refund
• xat reserves the right to cancel and refund any name without notice
• Note: a short name will put you higher up the user list