Yeah, DO IT!
I love funk. I absolutely love it.
You could probably get a decent collection CD with 'the hits' on it in a sale for a few quid. These are a good place to start because you can pick and choose the artists you like and buy more material. Another good resource is
www.allmusicguide.com - if you type in an artist it will give you a biog, simelar artists, artists worked with, influenced by etc... You get a really good picture of where it all started, where it went and who took it there.
Technically, many of these basslines are pretty difficult, then again some of the real beauties are very simple. I think the best way to learn these is to find bass songs you like and learn them by ear.
The most important thing is 'that groove', the notes become less important once the groove is there. You can play just simple root motions in the right place and it will groove like a mutha!
Other very typical 70's artists worth checking out are:
Herbie Hancock HeadHunters
Bootsy Collins (more glam funk, but damned good bass playin')
Stevie Wonder
The Meters
Superfunk
Mass Production (more disco, but some great and simple bass lines)
Also, some Motown hits CDs have some awesome bass lines that are a good starting point.
One song you HAVE to hear, is sly & the family stone, family affair. Soulful beyond belief.
Reggae - the obvious Bob Marley, babylon by bus is a superb live album... most of the wailers albums are wicked tho. I'd go for live reggae tho cause you can really hear the vibe.