last I was aware the Web interface (like Roku's) lacks a traditional guide so NO there is no way.
The browser exeprience is TERRIBLE! You can see what's playing on the "Channels" page currently, but no actual guide, so it's hard to know what's coming up soon, etc.
I'm glad there's at least a abasic browser experience available now (minimal shippable product, good agile practice!), but keep the updates coming or people will start looking elsewhere.