Are new intel CPUs vulnerable to Meltdown/Spectre?
When software mitigation protections are not correctly implemented new Intel CPUs are vulnerable to both Meltdown and Spectre.
Has intel released any information about new processors?
In an investors call Intel indicated that they are "working to incorporate silicon-based changed to future products that will directly address the Spectre and Meltdown threats in hardware."
Note that in-development silicon might not be at an early enough stage in development to fully resolve the exploits without software mitigation or performance impacts. Ideally they would implement a full fix that doesn't require software mitigation and has full performance, but the root of one of the exploits is branch prediction, meant to increase performance, and they may be unable - particularly at this stage of development - to keep full performance of branch prediction and still prevent this exploit.
So while these silicon fixes may "address" the threats, they may not be fully resolved wholly in silicon.
So, from what production date on will/are intel processors secured against speculative execution attacks?
At this time there is no definitive date or production schedule. Late 2018 is the timeframe to release silicon that "addresses" these threats, but there is no guarantee that release will fully resolve the issue in hardware without additional software mitigation. Performance has not been addressed at all in released or known information.