What technical issues are solved by storing DNS data in the main block chain, as opposed to an alternate yet connected block chain, as Mike has proposed?

I find the idea of one block chain per application, but connected in such a way that they can all be mined against simultaneously, much more appealing than one monolithic block chain. Similar to those that want to change Bitcoin to have constant inflation, or distribute payouts more fairly, or anything else... rather than trying to impose a change on all Bitcoin users, why not start a new chain instead?

I now return you to your regularly scheduled argument.