In particular I am looking at a couple in the "Twist-and-Turn" by Eileen Wright. I know that the fabric selection process will be time consuming. But, what about the actual pressing, cutting, piecing, matching seams, etc... It looks pretty intimidating to me (time-wise).

I wondered the same myself!

I think they are quite easy. I label everything really well, so that I don't get mixed up.

I want to make one I will be watching this.

Me too

I haven't made one yet....too chicken but I found this site and if memory is not faulty as been known on an occasion..it was posted here on the quiltboard?..www.qultville.com/scrapbargellopf.html
it is a scrappy one and it looks like even I could do this. made just like the trip around the world which are easy...I like it because get to use up those scraps...deffinately colorful!

The first one of anything always takes more time. I have done lots of bargellos and can tell you .... Just jump in... get the learning curve ( really not all that much)over with .. so you can move on to really enjoying just a new twist to strip piecing. If you can do strip piecing , you can do this! Her book has some that are more difficult than others... so I'm not sure which you are thinking about.
Starch your fabrics , it helps to keep everything going straight. I make a copy of the pattern , and take a marker or pencil and draw a line through the completed rows. Sometimes looking a the pattern it gets a bit confusing. Or take a sheet of paper and cover up the pattern of the row/column you just finished.
One of the benefits is they look harder than they really are.

http://www.quiltingboard.com/t-41828-1.htm#975492
This is the beginning of a tutorial that was done here on the board. I didn't make this one but you can find a lot of helpful information. You have to have plenty of time if you wnat to look through it.

I just finished Diamond Jubilee by Nancy Smith. Her patterns make bargello's amazingly easy. I posted the partially done top few weeks ago. I need to quilt it then I'll add the new pictures.

Thanks. I might try one day!