Maybe a bit of a shameless repost, but I really liked the discovery by Beeoneoneoh of a large Japanese Nissan Bluebird 510 blog.

They feature every aspect of the 510 ownership. From the nice and classy lineup pictures:

The men of 510: Nissan Bluebird 510 blog

To the funny bosozoku style pictures:

Funny bosozoku style Bluebird 510

To the cute pictures:

Awwww, how cute: a 510 couple!

I'd say check out their blog:
510????