Work is just about to get underway on a downtown arena, and in about a month's time, on the process for selecting art in and around the future destination. Shelly Willis, executive director of the Sacramento Metropolitan Arts Commission, said with $5.5 million allotted for art as part of the overall arena construction plan, there's bound to be strong interest from both artists and the public about what art becomes part of the project. By the end of August, the plan is to have an orientation…