Joe/Jamie,
I’d like to see a slight modification in the “left.cgi” file.
Line:
39
Code:
print “”;
Please adjust to:
print “”;
This would allow logos to be “centered” in the left panel by default. Either that, or if you want to make things more complex give users an option inside the “System Settings > Virtualmin Configuration > User Interface settings” to set the alignment.
As always, this is merely a suggestion, and the first idea would be a simple code edit, nothing too crazy 
*** on a side-note, it might also make sense to “center” the “Virtualmin, Webmin” links in the left menu. ***
-Peter