1. the basic concepts are the same though the detail differs.
2. individual technique and platforms don't exist in isolation. The key to any successful plan is timing and coordination.
There are a lot of comparable tasks fulfilling more or less the same function. If you grasp concepts then the exact media used is just a detail. If you get the concepts then adapting to new media trends becomes much easier to do successfully.
Creating a buzz includes all the same key elements it ever did.
One worthwhile point is that both work best when used together (new and old media, old school and new.
It also ties in strongly with leveraging your effort. Some are fairly obvious... publicity shots, promo videos etc can be use on and offline, but you should tie in live appearances, interviews, launch parties etc so you can use them both online and off.
Looling at a simple local gig... there are pre-gig activites and post gig activities. At your gig you directl add people to your mailing list using laptops, cell phones and tablet pcs, you tweet during the gig encouraging people at the gig to upload and share their pics of the event on your facebook page, you upload vids of live performed songs to your youtube channel after each song and live on stage you make mention of tweets, FB posts and Youtube comments... maybe offer a free T-shirt to an audience member who is particularly active blah blah. That's just scratching the surface at one event, ie not pre or post but during.
The key to building buzz oldschool or new is interactivity... and this is where your street team online and offline come into their own, supporting you the band. (most indie bands that have street teams view them as pre-gig assets but they are so much more.
like most creative tools and media, the actual tool and knowing about the need for the media for promo only scratch at the surface. Knowing how to use them is essential, amd must of the difficult part of all that is simply being a student of human nature and taking an interest in basic psychology.
I am on my cell typing this. I will write up some more when I get back to a pute.