I have a Minolta Dimage A2 8Mpixel camera with usual auto this and that and manual zoom. Very nice camera with excellent resolution.
The only gotchas are that is is very small and my fat fingers sometimes push the wrong buttons and get the camera into a mode I don't expect.
The resolution is adjustable in many different ways.
For web posting I would expect you to use medium low to medium resolution, otherwise it will take up a lot of memory for a single pic. At really low resolution the picture is too choppy. I think one camera I have goes down to 320x240 or something like that, and the picture is very blocky.
When I email using Microsoft Outlook, I find that resizing to 640x480 medium is good for most stuff without breaking the memory bank while 1024x768large is good for fairly detailed pics. I assume similar results for web work.
I usually take my pics on my camera in standard or fine resolution and post email as described above. If I go to extrafine or better and 3264x2448 size the file size becomes huge something like 10M+. For example at 3264x2448 RAW I get only about 12 pics on a 256M card. At 640x480 standard I get over 600 pics.
I have been sending a lot of pics over email and like I said the medium is good if you want to send a series of shots without over filling someone's email memory allotment.
Good Luck,
Jim Henderson