I found a hack (is this a hack?) on Niall’s Blog: http://charts.technorati.com/chart/[keyword]?size=
Fill in the keyword of which you like to have a chart of and the size. For example this one:
http://charts.technorati.com/chart/microsoft?size=xl and see for at the result. Great isn’t it!
Steve Rubel als did some experiments and got charts which displays a year timeframe….hhmm I did not. I just had a month in every test.
And Steve also made a Firefox Keyword Search.
Updated: see comment of Niall. I left out the + signs now.