Quote from: jjodwald on June 24, 2013, 10:51:43 PM

I would love to be able to get stats like average hashrate from current diff level and exact time of last diff change. Are there any available for majority of alts or do I have to collect them manually?

Find an Abe based block explorer and use the API.

BottleCaps example: http://bot.webboise.com:2760/chain/Bottlecaps/q/nethash
Doubloons example: http://explorer.doubloons.net/chain/Doubloons/q/nethash

Statistical values are approximate and differ slightly from http://blockexplorer.com/q/nethash.

/chain/CHAIN/q/nethash[/INTERVAL[/START[/STOP]]]
Default INTERVAL=144, START=0, STOP=infinity.
Negative values back from the last block.
Append ?format=json to URL for headerless, JSON output.