As of January 18th Lifebound Alchemist Stone can no longer be disenchanted
Well, first thing is first, you need alchemy and enchanting on the same character.
Okay, so we're in the first opening months of Cataclysm, High end enchants are high in price, and alchemy is a good source for the Maelstorm Crystals, especially if you're on a server without many raiding guilds.
Craft the trinkets that are soulbound, (hence needing enchanting on the same char) then disenchant them, maelstorm crystals are currently 1.9k EACH on my server with roughly 700-800g in investment.
Another thing to do is make the crystals to buy enchants such as "Power Torrent" and "Landslide" for 5 Maelstorm Crystals. Then enchant scrolls and then sell them on the AH and in /trade... On my server they are usually 12k per "Landslide" scroll, and often 15k per "Power Torrent" - Obviously this is server specific, but they shouldnt sell for anything less than doubling your money.