Some of the blogs like the one from Datameer don't have any feeds, but still I would like to get the changes to the blog in Google Reader.
Google Reader used to support this feature, but it no more works.
Any alternatives?
The google thread manually create a feed treats exactly your problem.
The advice there is to use Page2RSS, a website that claims :
Page2RSS is a service that helps you monitor web sites that do not publish feeds. It will check any web page for updates and deliver them to your favorite RSS reader.
I tried it by entering your datameer.com blog url into their "Page URL" field, hit the "to RSS" button, then under "Subscribe to Feed:" I clicked on "Google Reader". It then passed me to a google page where the button "Add to Google Reader" seems to have really added a feed to Google Reader.
There are various sites that can create RSS feeds from webpages. page2rss.com was already mentioned. See also feedity.com/ and feed43.com/.
(Also see Yahoo pipes tool which uses feedity. Yahoo pipes is useful for combining feeds and other stuff.)