In case anyone would like a walk down memory lane: http://wiki.guildwars.com/wiki/Feedback:Game_updates.
There's rewards of proofs for completing the regular pve game missions and/or heroes' ascent (pvp) which give you an extra Anniversary storage pane (which some may already have if they were playing at the 5th year anniversary) and can be exchanged for special weapons - the Decade set recreates some of the famous skins eg. crystalline sword (as greens which means not moddable but stats seem generally fine for heroes imo) and the Balthazar weapons are all gold moddables.
I'm playing at various times ... if you interested in meeting up
Happy Birthday GW!