BLC is a good play on DLC.
I don't mind acronyms as long as they don't stand for anything.
I think limiting it to clouds because of cloud computing isn't a great idea. It makes me feel like we're trying to jump on the buzzword bandwagon. I don't really see what RTB has to do with cloud computing anyway, or rather, I don't see what part of it behaves like a cloud. It's a download manager and a chat program. It doesn't store your preferences or add-ons or anything so you can load them up on any copy of Blockland.
If you're insisting on a cloud themed name though I'd just recommend Cirrus.
I thought about Blockpop and Brickwire as possible names, I don't really know if limiting it to bricks is a great idea though. Tons of mods and fan sites did the same thing, it's been done before and it's not cool anymore.
I like the word wire, since we are sending content through them, but we were kind of already beat to it by limewire, livewire, frostwire and firewire.
Boast - its a merge between Blockland and post, it makes me think of kind of an advertising agency for content makers.
Boost - changing the a in boast to an o in case boast sounds too pretentious. It reminds me of something that lets you boost your addon audience as well as boost your game.
Kraken - how awesome would it be to have a giant squid searching for addons for you? It's a rhetorical question, the correct answer is 'very'
Beam - addons are beamed to your computer through patented cutting-edge technology called "Internet." it's a parody on steam, but with a b for blockland
I like beam.
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