Yesterday I mentioned about running two TV's off one aerial. (UHF)  But instead of crawling around under the house getting dirty etc, I decided I would try a Digitech Indoor Amplified aerial from Jaycar. 
The cost for one of these devices is $59.95. I first had my doubts and asked if I wasn't happy, would there be a return policy if not satisfied. Of course, like most places there is a 7 day right of return as long as all original packaging is kept. 

Bringing the unit home, I immediately set it up and sat it on my TV cabinet and plugged into both the TV and power. A 6v adapter is included as is a USB cable to plug into a DVB-T Dongle for computers.  Straight away I had crystal clear images on all channels, but Maori, Prime and Trackside were missing.  This was soon fixed once I had my partner change the TV channels while I held the aerial up slightly higher. 

I now have the aerial fixed to the wall - there are two slots in the back of the stand to slot it over screws or similar.  All channels including radio coming in nice and clear and its hooked into my TiVo.

If you are looking for a UHF aerial, but don't want to run cables through your walls, or under floors, then I recommend this.   Obviously it pays to live in a Freeview UHF area though.  

I would post a link, but I the Jaycar page is not loading for me.  There is a link in the Two TV's one aerial thread of mine from yesterday though. 

edit: Here is the link to the product 
http://www.jaycar.co.nz/productView.asp?ID=LT3131&form=CAT2&SUBCATID=1016#4