Just to clarify the light issue, a 75W incandescent bulb may put out more light (measured by lumens) than a rated equivalent 75W (actual 15W) flouresent bulb.
People make the mistake of thinking these wattage comparisons are perfectly equivalent to light output, but they are not.
Does it matter then if you need to buy a 100W (equivalent) F bulb to replace a 60W I-bulb?
No, b/c the F-bulbs pretty much all cost the same regardless of wattage so who would care?

In regards to the mercury, there is a good factsheet here:
http://www.energystar.gov/ia/partners/promotions/change_light/downloads/Fact_Sheet_Mercury.pdf
And the important thing to note are quantities.
Everyone on these boards sucks in more mercury every year from eating fish and breathing air than you would if you ever managed to break a single CFL bulb somewhere in your lifetime.
Secondly, the mercury in these bulbs are inorganic (not organic) in form and often bound in an amalgam (the organic form - methyl mercury, is the toxic material). Anyone here over the age of 40 who has teeth fillings should be more concerened about that mercury content than getting mercury from a CFL bulb breaking

Education people, education....let's not monger the fear eh?

"Those who preach the myths of audio are ignorant of truth."