You answer:

Hi there! I know this is kinda off topic however I'd figured I'd ask.
Would you be interested in exchanging links or maybe guest authoring a blog
post or vice-versa? My blog discusses a lot of the same topics as yours and I feel we could greatly benefit from each other.

If you might be interested feel free to send me an email.
I look forward to hearing from you! Fantastic blog by the way!