Carrie Pestritto, my agent, is once again open for queries via her Query Critique Contest. She posted 8 hours ago, so it may be too late this time around, but maybe not. If you've got a query you would like critiqued (with a chance at getting your first 100 pages critiques as well), then check out her blog and the official rules RIGHT HERE.
Allow me to say that getting your query critiqued by an agent is an invaluable experience--and Carrie's excellent! If you miss out this time or don't have a query ready, bookmark her site for next time. Good luck!