Disappointed that they didn't go with a Fleming title (oddly enough, given the plot description Property of a Lady actually might have worked), but the title they chose has a nice John Gardner vibe/Evening Standard comic strip vibe to it. I'm also getting a vibe that this might be intended as a last hurrah for Judi Dench as M, too.
I just hope they don't forget that Casino Royale and Quantum of Solace were intended to be the first 2 parts of a trilogy. Both films left a number of story threads hanging, though that said while QoS got away with being set an hour after Casino Royale ended, it will be harder to rationalize Skyfall taking place immediately after QoS yet made 6 years later. So hopefully the Bond we see in Skyfall will be one who has 6 years of additional experience as opposed to the still-wet-behind-the-ears Double-O we had in the last 2 films.
Indeed, if you compare year-to-year, if Skyfall takes place in 2012, 6 years after the on-screen date of Casino Royale, Craig's Bond should by now have encountered Blofeld, done the LECTER tango with Tatiana Romanova and Red Grant, and loved and lost Tracey.
If I were EON, I'd push to have Bond 24 commissioned quickly with a release date to restore some confidence in the series. We're in the era of film series being made back to back, anyway, so they could set in on Bond 24 for a 1963 release (50th anniversary of From Russia With Love), confirm Daniel Craig for another outing now, eliminating some of the "is he going to stay on" speculation, and start filming it right after Skyfall is done.
Re: Richard Arnold. He does a good job, but there are others who would do well if he didn't come back. Murray Gold comes to mind, and Bear whats-his-name who composed for Battlestar Galactica. John Barry didn't score every "classic era" Bond - indeed two of the more striking scores in the series were done by others - Bill Conti's For Your Eyes Only and Monty Norman did most of Dr. No (we'll put the James Bond Theme debate to the side for a moment). A one-off by someone else could be quite refreshing. Or they could pull a rabbit out the hat and snag someone like John Williams, just to be different.