Help Creating A SELECT Statement For Today

Hello,

I am attempting to build a MS SQL query that will return data from
"today"; today being current day 8:00AM-10:00PM today. My goal is to
return the data from a table that is written to throughout the day, the
query will provide the current grade of service in our call center.

I am having difficulty defining my where clause:

- I can accomplish my goal my statically defining my 'date between' as
the actual date and time (not ideal)

- I can accomplish the second part of my date using CURRENT_TIMESTAMP;
but I am unable to define the starting point

Here is where I am thus far:

/* We are going to count the total calls into each queue from start of
business today (8:00AM) to now */

select COUNT(Result) as "Total Sales Calls Offered" from
dbo.QueueEncounter
where Direction='0'
and
QueueID='1631'
and
/* This is where I get lost */
Time between DATEPART(day, GETDATE()) and DATEPART(day, GETDATE())

Clearly the last line returns zero as there are no calls between the
same date range. How can I add to that line, or write this to work?

Any thoughts?

Thanks for the help.

-Chris