Thanks for that info! I’ll go take a look at the plugin, but while I am doing that, it looks like your paths have a couple of problems.
The path from your old host will not necessarily work, as things may be set up differently on DH.
Also, usually WordPress plugins are instalaled in the wp-content or wp-content/plugins directories.
First, the path to PHP is different on DH, and second, I can’t tell for sure what your “base” web accessible dir is for your domain. Normally on Dreamhost (for accounts created in the last couple of years) public_html is not used, the DreamHost panel creates a “base dir” for a domain with same name as the domain (or whatever name you choose when you “add a domain”), so make sure you are using the right dir name after you user name.
Assuming you have installed WordPress in the “base” dir of your domain, Try:
/usr/local/bin/php -q /home/your usernameuser/your_domains_base_dir_name/wp-content/wp_smartrss.php
and let me know if that works. I’ll go look at the page for the plugin, and check back here in a few minutes to see if my suggested fix works, and to find out what the “base” dir of your domain is and what directory you have installed wordpress in.