I usually do my comics around 700 x 950
Is this a good size or should I have something smaller?

I'd recommend making a comic as thin as possible while still making the text and details readable. Somewhere around 600 or 650 px wide should be perfect.

Yeah, I also keep it at 600 pixels wide for those with 800x600 monitors.

I keep my comic at 600x930.

612x793

You should not go beyond 800 dpi WIDE. People dont mind scrolling upside down, but they do scroling side to side. Its odd but true.

The smalles acceptable resolution in monitors is 800x600.. being 800 WIDE not 600. so a safe bet would be something along the lines of 780 wide.

If your page is wider than top to bottom, then your page shoudnt go beyond 580 HEIGHT

It's true, scrolling sideways is a pain. Maybe I'm just saying that because I'm so used to using a mousewheel (or whatever they're called) so when I actually have to drag my mouse to get somewhere and see something I get annoyed.

Another reason could be that we read left to right, top to bottom. So it's okay not to be able to see the end, but it's annoying if you can't see the whole "line" you're "reading".
Did that make sense?

around 560~590 wide by 777 tall is what I do.

450x660 - I use this because at 1024x768 resolution you can get the whole page on your screen in Firefox even with the tabs bar there. I just like not having to scroll down to read~

650x975

At 1st I had them at 990x1485. Though maybe I should up them to 700 wide. 650 seems so small for my work...

950x582

to take advantage of monitors and less scrolling aroud for 1024x768 resolution.
do this if you don't care about printing yer comic

I use 550x716, its long enough to conceal the bottom panels while people scroll down, and its wide enough to fit on the screen and be easily viewable.

I like to supersize mine.

830 wide
1275 deep

I'm mainly going for legibility here. My depth is kind of arbitrary since the comic is sized to fit regular comic book pages.

i think 600 X 5,000 is a pretty nice dimensions although i don't always make it to that extreem on the verticle ! i think the longest i ever went with a page is around 7,000p ,
and the absolute minimum is 240p wide for cell phones and 480 for older TV displays

Keep in mind too that if you ever want to print your comic on paper, most of these pixel dimensions won't be that useful unless your resolution is set to at least 200 or 300 dots (pixels) per inch (dpi). You can set this number in your scanning software as you scan your image. Most web images are fine at 72 dpi though. If you don't plan on printing anything, you don't need to worry about any of this.

This page boils it down nicely: http://www.lulu.com/help/index.php?fSymbol=image_res_and_size

I put one on the web at 620px wide, and keep the original scan at 300dpi in a folder on my HD in case I ever decide I want to make a printed version.

Mine are about 550x700. I normally just scan in a 8.5x11, color it, and shrink it down so it's 700 tall. Int erms of strips, I have no idea. I think it depends on the number of panels.

I'm not sure if there is an ideal size- but making them small enough for people with 800x600 screens is a good idea.