I went ahead and upgraded, and the transition seems to be impressively smooth. Atom 1.0 is now fully supported, and having done some reading on it I think I will be evangelizing it a lot more in the coming weeks, since it seems to solve a lot of issues with RSS (not the least of which is a properly written schema).

dasBlog 1.8 also comes with a pretty nifty theme called BlogXP, which I intend to provide as an alternative theme as soon as I get around to reworking it a little bit. So far I'm very pleased with the performance and usability enhancements, and will report further.

Update (14:28 GMT+2):
I just spent the last couple of hours hunting down what I perceived was an output caching issue with either dasBlog or ASP.NET. I updated this entry with a trackback link to Scott's website, but it was not properly handled (no trackback, and the linked text did not show to boot). To make a very long story short, apparently dasBlog has several "content filters" enabled by default; these content filters are regular expressions which match, among other things, the strings dasBlog, Newtelligence and Clemens Vasters and replace them with the appropriate links. Aside from these default filters being horribly out of date (the current maintainers are Scott and Omar Shahine), implicit defaults such as these really annoy me because they cause unexpected behavior (in my case, the string dasBlog inside an <a> tag was replaced with a complete hyperlink) and the behavior in itself is not necessarily desirable.

Also, a bug I neglected to report is yet to be fixed (it's now reported), and there are several other minor issues (such as this). Otherwise, dasBlog is a very solid piece of work indeed.