Here are two trades that tie together a number of rumors, that put Boston in a great position to add their 18'th banner.
Trade 1: Rondo, Walker, T. Allen, Pruitt for Gay and Conley
If Memphis is interested in Gay & Conley for Rondo, Walker puts it over the top. They get the most talented player in the deal, and avoid paying two players in two years.
Prior to the second deal, Boston needs to discus future contract expectations with Ray Allen. If Ray is interested in playing for championships until he retires, I think this works:
Trade 2: Gay and R. Allen for Thompson, Nocioni, Garcia, Udrih distant future first
Sacramento buys out the final year of Allen's contract for $14 million. The buyout and moving Nocioni, Garcia, Udrih and Thompson saves them $58 million over the next three years. The trade boils down to Gay and a ton os cap space / salary savings for Thompson and a future first. Sacramento goes forward building around Rubio-Martin-Gay-Hawes and a ton of cap.
Boston re-signs Ray after the waiting period for the full MLE over four years. As has been discussed, Conley is probably a step back from Rondo, but not a major one - he is younger, a willing defender, and shot 40% from three last season.
Udrih is a solid backup that can also handle and shoot, even with his terrible contract. Garcia is a top-notch backup shooting guard with deep range and starting experience. Nocioni is a perfect fit at swing forward, and Thompson is a talented young big that rebounds and defends, with the size and mobility to play the four or five. The future first is just gravy, here is your 2009-2010 championship roster:
Conley - Udrih - House
Allen - Garcia - Giddens
Pierce - Nocioni
Garnett - Scalabrine - Powe
Perkins - Thompson
We are a little across the tax line for the next couple seasons, but no more so than the previous two (Projected cap comitments $80M, $80M, $52M, $21M).