I'm glad I logged in today. I get to plug my wiki for Oracle of Ages (and Seasons, ostensibly) hacking: http://wiki.zeldahacking.net/oracle/Main_Page
There isn't THAT much useful information yet. However, in the "Common hacking questions" section, you'll find an invite link to a Discord server where I hang out most of the time. You can find the other Oracle of Ages hackers there. (There aren't many)
As for editing the titlescreen; the bad news is, the graphics are compressed. The good news is, it can be edited through the disassembly
. The bad news is, it's a pain to set up. The good news is, I made a page
explaining how to set it up.
I'm basically looking for any opportunity to spill out my knowledge of this game, so uh, let me know if you have any questions. =P