Valentine Roses

[Thoth]

Oceania
Take a quick trip West from the Spirituality Moongate in Ilshenar to the Mushroom Cave (Where we go for Dreadhorn). Cupid is on the West side of the cave.

[Thoth]

Arirang
Look into "Hanse's Magical Golden Mirror" in northern Nujel'm and say "love". You will be teleported to a secret underground room where cupid is hiding. There is a gate to the Nujel'm house at the Britain EM Hall, and a gate to the EM Hall at the West Britain Bank.
Update: The gates are gone, so the only way out of the secret room is to recall or use help->stuck.

[Thoth]

Mugen
There is no way to transfer items from Mugen, but I include it for completeness. Head over to the Hammer and Anvil blacksmith shop in NW Britain.

[Thoth]

Napa Valley
Pop over to the EM Hall in northern Britain. The statue is inside.

[Thoth]

Wakoku
Another cupid is hanging out at the EM Reward Hall in Malas, but there is no easy way to get there without recalling (so I bought some recall scrolls). There is a gate at West Britain Bank that takes you to the EM Hall in Nujel'm. Inside that hall is a rune on the table that goes to the Reward Hall. Alternatively, you can run there from Luna, but it's a long run.

[Thoth]

Siege Perilous
While there is no way to transfer items off of Siege, several PAS members play there on occasion. Take an easy trip to the EM Hall in Britain to find the cupid inside. Beware! Several thieves have been hiding inside the hall to steal your roses.

[Darkstar]

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[Thoth]

Great Lakes
Head to the Fairgrounds at the northern-most field in mainland Skara Brae. It's inside a tent on the South side of the field. Remember...say "cross" at the Skara Brae ferry to reach the mainland.

[Thoth]

Balhae
Visit Blackthorn's Castle in northern Britain. Cupid is in the NW corner of the ground floor. (If you find yourself in the throne room, go down the stairs on the West side.)

[Thoth]

Sakura
Visit the garden in New Magincia to find Cupid.

[Thoth]

Mizuho
Head over to the front gate in New Haven. The cupid is on the left side.

[Thoth]

I believe I've covered every shard now except Formosa, which I understand went away in less than a day.
Anyone collecting these should do so soon. The statues on several shards have already stopped working, so the timer on them is not reliable.