NOTE: hyperlink removed since I don’t have the trust level for that…
Sucks because it was such a good site with the info laid out nicely, good content, and extra info/details unique and not elsewhere.
Some efforts are underway to save it, or at least preserve its data. But no guarantees at this point. 
Sad to hear that. I think the only other place to help preserve all the data/guides would be to post it on the sc2 wiki page (assuming it’s free to post there ofc)
Hooray, just saw this update!
Site Update Notice
starcraft2coop dot com will stay available! Unfortunately, accounts and the replay analyzer are no longer working.
The site’s source code is now available on GitHub, where you can contribute changes.
Also, it’s now ad-free!