I tried downloading the RPM and using alien to convert it to a deb file then installing with dpkg. this lead to all sorts of problems. i found the best solution was to (first of all uninstall the rpm) then follow through this list which can be run as a user (but best to be done as root so all users on a system can use the program)
gunzip -d AdbeRdr70_linux_enu.tar.gz
tar -xf AdbeRdr70_linux_enu.tar
This stopped me getting the error:
There was an error while loading the plug-in 'PPKLite.api'. The plug-in failed to initialize.
As for adobe reader 7, on my system it loads fast (unlike 6 on windows) I like it and am keen to encourage companies to port their software to Linux. while for some users xpdf or gv are faster for more people to convert to Linux things like this are important. windows (L)users are easily put off when they are faced with something like xpdf which is not as easy to use as adobe reader 7 for Linux (which is identical to 7 for windows). Good one adobe, i like adobe reader 7. I'd recommend to the nay Sayers install it. try it for a couple of days then make your judgment call. it is an improvement on adobe 5 which was an ugly afterthought.
added this new:
forgot to say, if you install that way you will need to make a link to it. if you install as root and use the defult settings then this will get you a link to it (as root):
ln -s /usr/local/Adobe/Acrobat7.0/bin/acroread