I don't want to turn this into ZoteroBlog, but since reference managers are major productivity software for me and Zotero is changing and improving very rapidly here is another installment. Some of my previous worries about Zotero not coping well with Web of Science have been fixed. The handy little import this reference or this collection of references buttons are back in the Firefox URL bar.
Also I now understand how to get references out of WoS and into Zotero by export/import. To do this mark the references you want. Then go to the marked reference list and tick the info to export (ie check the abstract button). Select BibTex from the menu at the bottom and Save. BibTex is imported very well by Zotero.