I would like to access multiple flat screen monitors wirelessly from
my computer to do slide shows etc.
I know that the Panasonic plasma TVs have an SD card reader which lets
you upload still JPEG images. However, that is too inflexible and
cumbersome for my purpose. I also know Panasonic has a W-LAN module
for its 7 and 8 series of professional plasma screens(TY-FB7WPE) which
adds about $500 per monitor.

- Is there a cheaper and perhaps more elegant solution?
- What if I used flat screen TVs instead of normal monitors? Would that help?

Thanks!

Try 
Avocent Longview http://www.av.avocent.com/prod_longview.htm
or black box http://www.blackbox.com/Catalog/Detail.aspx?cid=1246&mid=4282

Neither is cheap.
I tried the Avocent, and it worked ok, but it would not work with my touch screen.

Good Luck!