New Bookmarking Services

Instapaper - extremely simple - lets you mark a web page as "Read Later" and get back to it later.  It also has an iPhone interface.

WebMynd approaches bookmarking differently: Don't bookmark them!  It saves local copies of web pages and allows you to search them later.  So instead of bookmarking at "compile time", you search for what you need at "run time".

Last but not least, Control C solves a slightly different problem but is somehow being compared with WebMynd so I'm bringing them in the same category.  It allows your copy-and-paste operation to propagate to the web.  You install the software, and any time you press Ctrl-C to copy something to your [Windows] clipboard it also saves it to the web - private and encrypted.  You can later on use the web-based clipboard for other purposes, including making parts of copied content public to others.