You can find keys from multiple persons here:
https://bitcointalk.org/verify_pubkeys.txtThis page contains keys from Maxwell, theymos, achow101 and more..
It also contains Wladimir J van der Laan's signing key:
# Wladimir's signing key 0x01EA5486DE18A882D4C2684590C8019E36C2E964
-----BEGIN PGP PUBLIC KEY BLOCK-----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=2Kph
-----END PGP PUBLIC KEY BLOCK-----
The best would be to confirm this information by looking at other independent sources.
If you trust bitcointalk.org (and its moderators!), you are fine to use it. The best would be still to verify it using other sources.