What's the difference between Liquid and Native Restaking?

Liquid restaking is the process of depositing liquid staking tokens (LSTs), e.g. stETH or rETH, into the EigenLayer smart contracts.
Native restaking describes the process of changing an Ethereum validator's withdrawCredentialto EigenLayer's smart contracts.

What Liquid Staking Tokens will be supported on EigenLayer?

For the testnet, stETH and rETH will be supported. In the future, the EigenLayer community can discuss adding additional LSTs based on demand from service modules, who have the agency to decide what LSTs they will accept to be restaked. Discussions can be initiated on the EigenLayer forum.
Potential criteria for inclusion : demand from service modules, meeting a specific market cap parameter, and amount of time the token has been live on mainnet.

Why is there a 7-day withdrawal delay?

EigenLayer is launching with a maximally conservative withdrawal delay, which is intended to only decrease over time.
Initially, all withdrawals will be manually reviewed for any anomaly, but this process will be increasingly automated over time.
A 7-day delay window should give ample time to review withdrawals for anything suspicious and pause relevant functionality if needed.

What are Restaking Points?

Restaking Points are a measure of your total EigenLayer restaking activity - your contribution to shared security. Based on amount of ETH staked over time, in units of ETH per second. In the future, services may prioritize restake from demonstrably long-term committed restakers.
For a precise definition of how Restaking Points are calculated, please see this section of the documentation.