Script Summary: Embeds Netvibes into Gmail by adding a "Netvibes" link.
Based on the Gmail + Google Calendar script by Pau Tomàs.
Edit: unfortunately, this doesn't work right anymore, Netvibes now has a break-out-of-frames code in their page that unloads Gmail when you click the Netvibes link. AFAIK, this can't be overrudden from Greasemonkey.
Update: It's now very easy to embed any site of your choice by changing the constants VIEW_URL and LINK_TEXT to whatever you want. Position of the link can be changed by changing the LINK_POSITION constant.
