There's also a sub-reddit.

https://www.reddit.com/r/ManicStreetMania/

It's not very active but it's way more active than the ManicStreetPreachers sub, which hasn't had a new post in two years. Sorry, Manics, you're just not a draw any more.

I remember the name Sparkle and Believe but I never went there.

What else? There was The Holy Bible or something. That was the first Manics site that I discovered. The official Manics site had a shitty forum for a couple of years.

I think it's just Forever Delayed now but I haven't looked into this in many years.