Re: SolidCoin 3.0 (aka MicroCash) will have a daily fee for each address you have.
Yes we are. It will be scalable, both because of Moore's law (transistor density doubling every two year)
BS. Have you seen how HD capacity evolved during the last couple of years? Barely any size increase... Additionally, Moore's law wasn't supposed to go on indefinitely, it just described a prediction of component evolution for a few decades.and because the blockchain can be stored distributed as well if necessary (still completely there and accessible to all, but distributed over multiple peers like a gigantic RAID).
This, on the other hand, sounds much cooler. Still needs to be implemented though, and doesn't seem trivial to me...The complete transaction history is one of the main strengths of Bitcoin, good job removing that in your altcoin 
I don't really think the complete transaction history is a strength. For a currency supposed to be anonymous, I'd rather call it a weakness, and not a minor one. Otherwise, I suppose it's a requirement for the thing to work, at the moment. But getting rid of it (reliably, and after a decently long time) would definitely be a step forward, not backward.