i think there are compelling reasons to have a strong EUR market. bitstamp seems to be stuck on dollars, because of liquidity concerns. but this creates unwanted fees for converting between dollar/euro with their bank.
this is a gap that kraken could fill.
I now see their websites says:
We offer the following deposit options:
Bitcoin Deposit
Litcoin Deposit
SEPA Deposit (EUR only)
Bank Wire Transfer (EUR only)
Other deposit options (including USD deposits) coming soon.
So I guess USD deposits are coming but no ETA on that. No mention of other currencies.