X.Org Server 1.10 was released in late February after RandR 1.4 was pulled from the release. X Server point releases don't add in any new features, however, but just correct outstanding bugs.
The xorg-server 1.10.1 release has bug-fixes for XQuartz, X Input, XKB, and various other areas, but no single change jumps out as being too prominent.
Jeremy Huddleston, an employee of Apple, is again managing the X.Org Server 1.10 stable series like he had stepped up to do with X.Org Server 1.9. He stepped up to the plate for xorg-server 1.9.x since Apple is shipping it with Mac OS X 10.7 "Lion". Right now with their Mac OS X 10.7 Developer Preview 2 build (benchmarks coming out on Monday), they are using X.Org Server 1.9.5 (after upgrading from 1.9.4 in DP1), but it's unlikely they'll be jumping to xorg-server 1.10.x for Mac OS X Lion.
The release announcement and change-log for X.Org Server 1.10 can be found on the mailing list.
Also in X.Org news, I'll hopefully have new details to announce next week to the X.Org developers for XDC2011 in Chicago. Just waiting back on one of the universities to provide the needed information. Ideally it's going to be 12~14 September (the week following the Linux Plumbers' Conference) in Chicago at the Illinois Institute of Technology, but wait for an official announcement on the X.Org mailing list to know when it's been confirmed and then can begin making travel arrangements.