I'm sorry to see that honestly. Considering it was the last standing, original, 25 man progression guild on the Horde side that I am aware of.
I was there on Llane when Mono first started, and remember the promotions in trade chat. I remember when they cleared Molten Core and BWL. I remember when they helped open the gates of AQ (though, I don't remember if they managed to ring the gong in time). I remember when they downed C'Thun and were the only guild to do it when it was relevant, if I remember correctly. I also remember when they took a crack at the original Naxxramas, something very few people stepped foot into.
I remember in TBC, when they used to compete with Pinnacle for top Horde spot, and even top server spot.
Over the years I played with many people from Monolith, and I have to say it was always a good experience, and so now I find it sad that another good, long standing guild, run by good people on Llane has had the axe drop on it as well.
Maybe one day you'll take a crack at it again, and if you do, I hope the best. Take it easy guys.