Atm iCoC and SB doesnt share diminishing return, hence shattered barrier is very popular. Some people like it, other hate it since it can screw your CC (break sheeps etc).
As for glyphs, me and most of the PvP mages i guess use:
Prime: Frostbolt, Lance, FFB (some like magearmor)
Major: Barrier, Evo (can be discussed after nerf though..) and Polymorph (some switch to Icy Veins ex)
And now about specc;
Your specc miss some keytalents like FoF, imp Freeze and deeper Fire or Arcane speccing.
There are generally two ways of speccing when Frost PvPing.
1#
http://wowtal.com/#k=w51GKNBt.a8t.mage.
This is my personal favorite, since i like imp Blink + Invocation too much. Most times when you're going for a kill including CS you need that final burst to get the kill, thats why 10% increased dmg is appealing to me.
2#
http://wowtal.com/#k=SBInkpdl.a8t.mage.
This is built around Impact which can prove gamebreaking. It seems to procc ALOT as well, i actually managed to DI impact by itself
I put 1 point into blazing speed as well, some people like 2/2 there, but i actually think impact is better for most situation.
As everything, the specc potential differs alot depening on what comp you are running, how your playstyle is and who you face.
Hope this gives you some insights of the present