The old timers give the young'ns tips on the 60s.

Check out the deluxe edition (2CD) of the "Easy Rider" movie sound track. It's a nice compilation of music from this period.

CAPTAIN BEEFHEART

Savage Grace- "All Along the Watchtower"

I also enthusiastically recommend the Blues Project, thanks to Al for the link to the anthology, as my Projections album is in awful condition. Danny Kalb remains one of my favorite guitarists of all time. Also, any Byrds or Yardbirds (look at the guitarists they had in their group--Beck, Clapton and Page, as I recall) albums. Tim Buckley's Hello Goodbye album and Tom Rush's albums in the folk-rock genre. All of the Pentangle's albums are worth getting (especially for John Renbourne's guitar work). And Vanilla Fudge's album is worth it just for their rendition of the Supremes' hit You Keep Me Hangin' On.

Just a bunch I think I haven't seen mentioned yet. Most of these and the ones already mentioned actually sit astride 1970 but I would guess that is not a hard cut-off date for your purpose.

The Nice
Soft Machine
Gong (the Kevin Ayers era)
Colosseum
Ten Years After
The Crazy World of Arthur Brown
Edgar Broughton Band
Pink Fairies
Tyrannosaurus Rex