I have used reverse rings back in the days of film SLR cameras.
I see where others use them on DSLR cameras.
The results are generally very good.
The rings are not that expensive (found on ebay).
Get one and give it a try.
From trying out a Canon T1i in a store (I took my own sd card so I could look at photos in ps back home) & from online reviews the included 18-55mm kit lens does not do well with macro. And looking at canon's web site produces a list price of $400.00 for their cheapest macro. This brings up the question of using a reverse ring to allow the kit lens to be mounted backwards to allow for macro shooting.
Anybody have experience with this - perhaps recommendations. Fotodiox makes several better quality (aluminum vs plastic) add-on items for macro shooting including a reverse lens adapter (http://www.fotodiox.com/catalog/product_info.php?products_id=157) that look interesting.