Ok, this is not all that pretty, but it at least returns the right values. I'm sure there's a more efficient way of acquiring them, though. It creates a temporary table that eventually contains a row for each Blocking SPID/Blocked SPID combination, including "indirect" blocks, and then counts them per blocking SPID. Hopefully something like this (or a more efficient suggestion from someone else) will help you get what you want.

SELECT Blocked AS Blocker, spid as Blocked INTO #BlockedSpids FROM master.dbo.sysprocesses

WHERE blocked>0

WHILE EXISTS (SELECT Headblocker.Blocker,Tailblocked.Blocked FROM #BlockedSpids AS HeadBlocker

inner join #BlockedSpids AS Tailblocked

ON Headblocker.Blocked=Tailblocked.blocker

WHERE NOT EXISTS (SELECT * FROM #BlockedSpids AS cmpr WHERE Headblocker.blocker=cmpr.blocker and Tailblocked.blocked=cmpr.blocked)

)

BEGIN

INSERT into #BlockedSpids

SELECT distinct Headblocker.Blocker,Tailblocked.Blocked FROM #BlockedSpids AS HeadBlocker

inner join #BlockedSpids AS Tailblocked

ON Headblocker.Blocked=Tailblocked.blocker

WHERE NOT EXISTS (SELECT * FROM #BlockedSpids AS cmpr WHERE Headblocker.blocker=cmpr.blocker and Tailblocked.blocked=cmpr.blocked)

END

SELECT Blocker, COUNT(Blocked) AS AllBlocked FROM #BlockedSpids

GROUP BY Blocker

I hope this helps!