I concur. The plugin rocks. Having the ability to format the sidebar would make it even better. As it is, I have tweaked the ics-import.php file to get what I want, but I have to save a copy of it to re-modify the php every time I upgrade. Having the ability to modify the format via the gui would save me some tedious work.
I also noticed that the gui automatically escapes quotation marks, but then the backslahses remain in the html that the php builds. So I can't put my own style or class on the custom formatting.
For example, if I put this in the custom formatting:
<ul style="list-style:none; ">
Then the gui automatically saves it as
<ul style=\"list-style:none; \">
And the resulting markup shows up as
<ul style=\"list-style:none; \"></p>
<li><strong>Test Meeting</strong><br />
Wed, Apr 16</p>
Which negates my style changes.