So the tags you organise your feeds in (these are folders in Bloglines) have feeds, so now you can make topic feeds to share, the only other RSS reader that I know of that has this feature is Feedmarker
…this is like making a basic spliced feed at Feed Digest (although Feed Digest does alot more)
What about an OPML for each tag!
How often to you try out a new RSS reader and you want to import several feeds, but your only choice is manually doing it or importing your whole OPML, which can take some time if you have hundreds of feeds.
An OPML at the tag level will solve this issue…the real delight is that you would be able to share OPML packets of feeds to instantly whack in your RSS reader, at the moment Rojo lets you share a feed of a tag that you can put in your RSS reader but this will be one spliced feed, not each individual feed
…again Feedmarker already serves a OPML at the tag level…they seem to be ahead with power user functionality but don’t get as much credit as they deserve.
Rojo also offer an RSS feed for your whole account, this is one massive spliced feed…this was my wish for Bloglines a while back.