On June 27th we will provide a link to the claim page, which will walk you through the simple process.
In addition to distributing lumens to bitcoin holders, we have also reserved 1% of the initial lumens (1 billion) to holders of XRP. For XRP, we took a snapshot of the ripple ledger 6,762,000 (a ledger occurring May 22nd 2014). Any ripple account holder with less than 7.5 million XRP (~$50,000 USD at that time) in their account at that ledger qualifies for the giveaway. Every qualified XRP holder can participate in either one of two ways:
1) Pro-rata: Similar to the bitcoin holders, eligible XRP holders may receive their pro-rata share of lumens allocated to this giveaway (1%) and be credited for up to 1.5 million XRP.
2) Donation: Eligible XRP holders may also donate up to 1.5M XRP to a selection of charities and receive an equal amount of lumens in return.