if you find any cool seeds send them here
here is one i found for b1.8.1
-505148773993706531
has a spawner behind player in desert its a surface spawner w 3 iron in chest

The one I found on July 13th that is now used for like everything
-686281048159566282
You spawn in a spruce biome with a double canyon right next to you. The canyon has a mineshaft with a couple of easy accessible chests, as well as a near skeleton spawner.

Before the first run for HV was even submit, I used worstseedever, which has become the standard for most HV 1.5-1.7 runs, I believe it's worth putting out for the sake of documentation, regardless of you being able to just watch literally any beta 1.5-1.7 run to see the seed

I found this Beta 1.8 seed earlier today | 7024913924079194411 | It's special because you spawn on a rather large island, but its full of sheep. If you look closer, every flock of sheep has a pink sheep! Exactly 12 pink sheep spawn on the spawn island. Not sure if it will be useful for speedrunning, but it is a 100% pink wool chance. I thought it was cool.

b1.8.1 -518743923793920249 wr seed for all swords, all minerals, obtain lapis and obtain redstone (found by me on 2021-11-11 while doing rsg attempts)

299477032781093297 b1.8.1 dig straight down below spawn and hit both mineshaft and stronghold