There is an app for that.
PhotoSync (Sync to Picasa) automatically syncs local folder to Picasaweb, so you can select your camera folder. It's free and not so huge as G+ app. You can set your local folder and Picasa folder and sync them on eg. hourly basis.
I believe this is now possible if you sign up to Google+.
Install the Google+ app. Open it. Then under Menu->Settings there is an Instant Upload option with the following description: "Automatically upload new photos & videos to a private web albumn."
There are also a bunch of settings to control it under Instant Upload Settings.
When you activate ...
The blogger images showed up because they're hosted in Picasa which is integrated into the Android gallery.
But as a workaround you could host your images on Picasa and link to them from your blog.
Open GALLERY Select My Library Open up the album that has the photos you want.
Press the MENU key ( the one that is left of the home key)
Push the 'SELECT MULTIPLES'
Then select the photos you want to upload (the pics selected will have a green box with a white checkmark displayed on it).
Press the MENU key again, choose QUICK UPLOAD to ...
With the big Google Plus push this past year, Google have been slowly moving to retire Picasa Web Albums entirely. First, they made it so that all of your Picasa albums are available via Google+ Photos, then they've set Picasa 3 desktop application's sharing options to Google+ as the default, then they even started redirecting https://picasaweb.google.com/...
I just solved this issue after a lot of searching.
The normal Picasa page takes you to Google+, and it does not show the empty folders etc.
You have to use Picasa mobile:
Log in, and you can delete whatever you want.
You can do this via WiFi, using a remote management app like e.g. AirDroid or, when on Windows, MyPhoneExplorer. There are a lot more apps like this, and they give you the added benefit of being able to manage a lot of other things remotely -- as e.g. reading/writing SMS, managing apps/contacts/ringtones, copying files between your device and your computer, ...
That is described at the Google Support page for Picasa as a limitation, even if you're currently paying for extra space, that doesn't allow you to have image files larger than 2048 pixels on their longest edge:
Picasa and Picasa Web Albums - Free storage limits
Free storage limits
Photos up to 2048 x 2048 pixels and videos up to 15 minutes won't ...
I would bite the bullet and install the Google+ app.
In addition to Instant Upload, the Google+ app will give you unlimited storage of the photos that are uploaded via Instant Upload:
All photos uploaded in Google+ will be automatically resized to 2048 pixels (on their longest edge) and won't count towards your free storage quota.
The Picfolio App from Google Play downloads Picasa photos and thumbnails to my external SDCard. In settings, you specifiy which Picasa Web albums you want to cache on your phone and where to put them, external SDCard or internal.
Display still works when both WiFi and 4G data services are turned off on my Samsung Galaxy II (Gingerbread 2.3). (You have to ...
JustPictures! might be the app for you. It has excellent support for Picasa Web Albums and lets you download (sync) full albums to your phone. You can also save individual photos to your SD Card (open a photo, press menu, select save photo).
One limitation is that you may struggle to open other people's albums. Related link.
The HTC Hub suggestion put me in the right direction. I enabled the plugin when I was not using Picasa Web. Since Google+ I do, but the plugin said my google account was not linked to picasa web. Uninstalling and reinstalling did the trick.