A blog is an interesting thing to read if it...
1) Covers a subjet of interest
2) Is updated regularly
3) Is entertaining to read
There are people who actually make $$$ blogging. For a product manufacturer trying to get out the word about a product, your web-site and a FB page should be plenty. A blog won't get the info out to folks unless they are really looking for you/it same with a web page. But on FB anyone who likes or posts on your page notifies all their friends of this activity, and sometimes thier friends too, so you can really hit the masses that way. Also a forum like this is good, as folks who are interested in similar stuff have a good chance of finding you by chance
