LAN info, Celsius/Fahrenheit option (along with a settings screen, with other options obviously, of course this can be integrated later) are some things I'd like to see added, but were already noted. Also external hard drives if that's possible.
I have a Sony Vaio with built-in SDCard and MemoryStick PRO readers. And in Speccy they are reported as Hard drives, in my opinion they would fit better in 'Optical Drives'. Otherwise if nothing is connected they always show 0MB. Which is rather annoying, to me anyways.
And my main HDD is reported as a 160GB correct model (unknown interface), it's really a 141GB. Before you say anything, yes I know they change and are not always the advertised size, but in Speccy underneath the selected Hard drive there is Real Size. Couldn't this be used to show the 'actual' HDD space? Or rather, just show the actual size next to it in parentheses.
Great work. I use all of the Piriform products, and I'm looking forward to the official release of this one.