Mine

SELECT ci.name as Category,
	   si.name as Product,
	   count(r.softwareid) as 'Count'
FROM requests r
inner join software_information si on si.softwareid = r.softwareid
inner join category_information ci on ci.categoryid = r.categoryid
inner join tracking_information ti on r.ipaddress = ti.ipaddress
WHERE r.requestdate between '2006-05-01' and '2006-05-30'
group by si.name, ci.name
ORDER BY ci.name, si.name

--Uniques
SELECT count(distinct sessionid) as 'Uniques without leads'
FROM tracking_information ti
WHERE ti.sessiondate between '2006-05-01' and '2006-05-30'
and ti.ipaddress not in (select ipaddress from requests where requestdate between '2006-05-01' and '2006-05-30')

SELECT count(distinct sessionid) as 'Uniques with leads'
FROM tracking_information ti
WHERE ti.sessiondate between '2006-05-01' and '2006-05-30'