Here is the list of useful WEB 2.0 platforms you can use. You can see it and pick up the most suitable for you.
2itb, anglefire, areavoices, bcz, blinkweb, blog, blogetery, blogger, bloghi, blogpico, devhub, doodlekit, edublogs, evood, fc2, fixya, gather, iblog, inube, Mytripjournal, ohlog, Officelive, Posterous, Onsugar, Rediff, Shutterfly, salon,snappages and so on..
Thats enough for the firts time, I think. All these platforms are USA
For easy to customize, blogger is the best. However for easy to implement SEO factor and to create proper URLs, its better to use wordpress. Both have their own feature. For a beginner, i will suggest blogger.
No matter which blogging platform you use, make sure you own the content of what you are blogging. If you post on Tumblr, Tumblr will own the rights to your content.
I use WordPress with MLSP (My Lead System Pro) and it is very effective for drawing leads from social media to the site and then keeping them engaged. I own my site and make affiliate money for promoting certain MLSP products and campaigns. It's affordable and comes with all the necessary tools for successful blogging.