
3 answers
Instead of assigning the leads to a User (yourself) you should consider assigning them to a Queue. A queue is essentially an unassigned lead and any queue members can work an item owned by the queue. When they go to convert the lead it will require them to enter a record owner as queues cannot own accounts/contacts or opportunities.
More on queues: https://help.salesforce.com/apex/HTViewHelpDoc?id=queues_overview.htm&language=en