I wasn't really sure where to put this (and also not sure if this is useful/interesting to anyone besides me but who knows?) so I'll just leave it here:
Here's a
South Ostrobothnian - Finnish dictionary that is still being updated! (Scroll down a little, there's first text at the top of the page.) I think it's so cool. You don't usually see anything like this about dialects, at least not anything as comprehensive as this. It even has examples of how to use the words in sentences!
Note though that the admin of the page does not mark where the words are used, so there are words that are only known in some parts of S. Ostrobothnia, words that have the same meaning but different pronunciation in different towns, and words that look the same but whose meaning changes depending on where you are. The dictionary is also lacking words because it's based on what words the visitors send the admin. So, it's not perfect, but it's very impressive IMO!
(For example, there's both flänkyttää and flänköttää with the same meaning. I don't know where they are used, but I think it's an example of a word that has two possible pronunciations that are used in different towns. Also, I've learnt the word frääsätä as prääsätä but only in the sense of "splash, splatter water" (which you can find listed under "P"), and for me naalia is nääliä (this variant is not listed in the dictionary).)
Finland (Suomi)