It's back online.

You probably emptied the address and had the big chunk come back as change to a different address. Check the TX on a block explorer.

short answer, i know anybody described it but couldn´t find post.

It looks like it would be very useful to add "Backup wallet" button (or menu item) in Byteball wallet GUI... That could help people and reduce the number of questions on this. In any case, having a explicit backup functionality is a nice feature.

I would love to do that myself, but Javascript is not one of my best languages unfortunately... Is there anybody playing with BB wallet sources already, or tonych is still the only developer working on this project currently? It would be nice if somebody else could  implement this, so tonych could concentrate on core tasks... I see a lot of people here: https://github.com/byteball/byteball/network/members, but not sure how much they are involved.

No, you don't have to link again your BTC account.

For second distribution, do we need to "register" our byte address at all? or all the outstanding byte addresses will be used for distributions? I ask this because some (though small number as byteball is new) addresses may be dead addresses (lost, deleted etc).

Yes you need to "register" your address to get blackbytes, but if you only want byteballs you don't need to "register" your address. All byteball addresses will be included in the second distribution and get extra byteballs without "registering". However to get extra blackbytes you need to "register".

http://coinmarketcap.com/currencies/byteball/#markets

how about list this on more exchange platform?

like bittrex or poloniex?

Good idea, the more exchanges, the more exposure, this coin is the most innovative after Ethereum platform, but the market cap is still small now. If it can be listed on more exchanges, the price will go up significantly. Look IOTA, it is also not on any big exchanges, that is vapor power right now. Don't learn IOTA.

Haha....Regarding your alt addy's, I suspect you're just f'ing around with the newbs. Unless I've completely missed something, linking alt addresses is not part of the distro plan and should be avoided. Afaik, only BTC addresses are valid for linking.